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Finding the Fourth Proportional to 602,720.10, 904,080.15 and 390,143.70

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Solution

The fourth proportional to 602,720.10, 904,080.15 and 390,143.70 is: 585,215.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    602,720.10 : 904,080.15 = 390,143.70 : x
  2. Step 2: Convert to fraction form
    602,720.10/904,080.15 = 390,143.70/x
  3. Step 3: Cross multiply
    602,720.10x = 904,080.15 × 390,143.70
  4. Step 4: Simplify right side
    602,720.10x = 352,721,174,817.56
  5. Step 5: Solve for x
    x = 352,721,174,817.56/602,720.10
  6. Step 6: Final answer
    x = 585,215.55

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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.