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Finding the Fourth Proportional to 496,620.10, 744,930.15 and 390,331.90

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Solution

The fourth proportional to 496,620.10, 744,930.15 and 390,331.90 is: 585,497.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    496,620.10 : 744,930.15 = 390,331.90 : x
  2. Step 2: Convert to fraction form
    496,620.10/744,930.15 = 390,331.90/x
  3. Step 3: Cross multiply
    496,620.10x = 744,930.15 × 390,331.90
  4. Step 4: Simplify right side
    496,620.10x = 290,770,000,816.79
  5. Step 5: Solve for x
    x = 290,770,000,816.79/496,620.10
  6. Step 6: Final answer
    x = 585,497.85

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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.