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Finding the Fourth Proportional to 408,428.22, 611,388.31 and 369,937.02

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Solution

The fourth proportional to 408,428.22, 611,388.31 and 369,937.02 is: 553,769.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,428.22 : 611,388.31 = 369,937.02 : x
  2. Step 2: Convert to fraction form
    408,428.22/611,388.31 = 369,937.02/x
  3. Step 3: Cross multiply
    408,428.22x = 611,388.31 × 369,937.02
  4. Step 4: Simplify right side
    408,428.22x = 226,175,164,557.61
  5. Step 5: Solve for x
    x = 226,175,164,557.61/408,428.22
  6. Step 6: Final answer
    x = 553,769.69

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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.