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Finding the Fourth Proportional to 645,215,998.40, 967,823,997.60 and 645,215,998.40

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Solution

The fourth proportional to 645,215,998.40, 967,823,997.60 and 645,215,998.40 is: 967,823,997.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,215,998.40 : 967,823,997.60 = 645,215,998.40 : x
  2. Step 2: Convert to fraction form
    645,215,998.40/967,823,997.60 = 645,215,998.40/x
  3. Step 3: Cross multiply
    645,215,998.40x = 967,823,997.60 × 645,215,998.40
  4. Step 4: Simplify right side
    645,215,998.40x = 624,455,526,886,963,200
  5. Step 5: Solve for x
    x = 624,455,526,886,963,200/645,215,998.40
  6. Step 6: Final answer
    x = 967,823,997.60

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Half scale
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Double scale
Find fourth proportional to 645,215,999.40, 967,823,999.10 and 645,215,999.40
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.