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Finding the Fourth Proportional to 486,952.40, 730,428.60 and 287,368.40

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Solution

The fourth proportional to 486,952.40, 730,428.60 and 287,368.40 is: 431,052.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,952.40 : 730,428.60 = 287,368.40 : x
  2. Step 2: Convert to fraction form
    486,952.40/730,428.60 = 287,368.40/x
  3. Step 3: Cross multiply
    486,952.40x = 730,428.60 × 287,368.40
  4. Step 4: Simplify right side
    486,952.40x = 209,902,098,096.24
  5. Step 5: Solve for x
    x = 209,902,098,096.24/486,952.40
  6. Step 6: Final answer
    x = 431,052.60

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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.