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Finding the Fourth Proportional to 629,861.76, 869,287.68 and 361,584

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Solution

The fourth proportional to 629,861.76, 869,287.68 and 361,584 is: 499,030.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    629,861.76 : 869,287.68 = 361,584 : x
  2. Step 2: Convert to fraction form
    629,861.76/869,287.68 = 361,584/x
  3. Step 3: Cross multiply
    629,861.76x = 869,287.68 × 361,584
  4. Step 4: Simplify right side
    629,861.76x = 314,320,516,485.12
  5. Step 5: Solve for x
    x = 314,320,516,485.12/629,861.76
  6. Step 6: Final answer
    x = 499,030.96

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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.