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Finding the Fourth Proportional to 645,998.92, 968,998.68 and 290,597.80

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Solution

The fourth proportional to 645,998.92, 968,998.68 and 290,597.80 is: 435,896.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,998.92 : 968,998.68 = 290,597.80 : x
  2. Step 2: Convert to fraction form
    645,998.92/968,998.68 = 290,597.80/x
  3. Step 3: Cross multiply
    645,998.92x = 968,998.68 × 290,597.80
  4. Step 4: Simplify right side
    645,998.92x = 281,588,884,610.90
  5. Step 5: Solve for x
    x = 281,588,884,610.90/645,998.92
  6. Step 6: Final answer
    x = 435,896.83

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Double scale
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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.