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Finding the Fourth Proportional to 530,400.03, 731,970 and 288,691.38

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Solution

The fourth proportional to 530,400.03, 731,970 and 288,691.38 is: 398,403.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    530,400.03 : 731,970 = 288,691.38 : x
  2. Step 2: Convert to fraction form
    530,400.03/731,970 = 288,691.38/x
  3. Step 3: Cross multiply
    530,400.03x = 731,970 × 288,691.38
  4. Step 4: Simplify right side
    530,400.03x = 211,313,429,418.60
  5. Step 5: Solve for x
    x = 211,313,429,418.60/530,400.03
  6. Step 6: Final answer
    x = 398,403.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.