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Finding the Fourth Proportional to 667,712.70, 921,444.45 and 361,792.41

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Solution

The fourth proportional to 667,712.70, 921,444.45 and 361,792.41 is: 499,274.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,712.70 : 921,444.45 = 361,792.41 : x
  2. Step 2: Convert to fraction form
    667,712.70/921,444.45 = 361,792.41/x
  3. Step 3: Cross multiply
    667,712.70x = 921,444.45 × 361,792.41
  4. Step 4: Simplify right side
    667,712.70x = 333,371,608,246.62
  5. Step 5: Solve for x
    x = 333,371,608,246.62/667,712.70
  6. Step 6: Final answer
    x = 499,274.03

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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.