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Finding the Fourth Proportional to 499,617.32, 749,343.88 and 215,230.72

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Solution

The fourth proportional to 499,617.32, 749,343.88 and 215,230.72 is: 322,810.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,617.32 : 749,343.88 = 215,230.72 : x
  2. Step 2: Convert to fraction form
    499,617.32/749,343.88 = 215,230.72/x
  3. Step 3: Cross multiply
    499,617.32x = 749,343.88 × 215,230.72
  4. Step 4: Simplify right side
    499,617.32x = 161,281,822,819.99
  5. Step 5: Solve for x
    x = 161,281,822,819.99/499,617.32
  6. Step 6: Final answer
    x = 322,810.71

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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.