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Finding the Fourth Proportional to 391,801.39, 540,691.72 and 228,453.50

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Solution

The fourth proportional to 391,801.39, 540,691.72 and 228,453.50 is: 315,269.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,801.39 : 540,691.72 = 228,453.50 : x
  2. Step 2: Convert to fraction form
    391,801.39/540,691.72 = 228,453.50/x
  3. Step 3: Cross multiply
    391,801.39x = 540,691.72 × 228,453.50
  4. Step 4: Simplify right side
    391,801.39x = 123,522,916,635.62
  5. Step 5: Solve for x
    x = 123,522,916,635.62/391,801.39
  6. Step 6: Final answer
    x = 315,269.22

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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.