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Finding the Fourth Proportional to 645,905.40, 968,420.70 and 330,102.60

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Solution

The fourth proportional to 645,905.40, 968,420.70 and 330,102.60 is: 494,930.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,905.40 : 968,420.70 = 330,102.60 : x
  2. Step 2: Convert to fraction form
    645,905.40/968,420.70 = 330,102.60/x
  3. Step 3: Cross multiply
    645,905.40x = 968,420.70 × 330,102.60
  4. Step 4: Simplify right side
    645,905.40x = 319,678,190,963.82
  5. Step 5: Solve for x
    x = 319,678,190,963.82/645,905.40
  6. Step 6: Final answer
    x = 494,930.36

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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.