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Finding the Fourth Proportional to 471,707.20, 707,560.80 and 272,641.60

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Solution

The fourth proportional to 471,707.20, 707,560.80 and 272,641.60 is: 408,962.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    471,707.20 : 707,560.80 = 272,641.60 : x
  2. Step 2: Convert to fraction form
    471,707.20/707,560.80 = 272,641.60/x
  3. Step 3: Cross multiply
    471,707.20x = 707,560.80 × 272,641.60
  4. Step 4: Simplify right side
    471,707.20x = 192,910,508,609.28
  5. Step 5: Solve for x
    x = 192,910,508,609.28/471,707.20
  6. Step 6: Final answer
    x = 408,962.40

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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.