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Finding the Fourth Proportional to 456,672.74, 629,792.11 and 392,121.73

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Solution

The fourth proportional to 456,672.74, 629,792.11 and 392,121.73 is: 540,770.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,672.74 : 629,792.11 = 392,121.73 : x
  2. Step 2: Convert to fraction form
    456,672.74/629,792.11 = 392,121.73/x
  3. Step 3: Cross multiply
    456,672.74x = 629,792.11 × 392,121.73
  4. Step 4: Simplify right side
    456,672.74x = 246,955,169,158.77
  5. Step 5: Solve for x
    x = 246,955,169,158.77/456,672.74
  6. Step 6: Final answer
    x = 540,770.56

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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.