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Finding the Fourth Proportional to 637,689.62, 879,946.55 and 392,635.46

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Solution

The fourth proportional to 637,689.62, 879,946.55 and 392,635.46 is: 541,796.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    637,689.62 : 879,946.55 = 392,635.46 : x
  2. Step 2: Convert to fraction form
    637,689.62/879,946.55 = 392,635.46/x
  3. Step 3: Cross multiply
    637,689.62x = 879,946.55 × 392,635.46
  4. Step 4: Simplify right side
    637,689.62x = 345,498,212,071.75
  5. Step 5: Solve for x
    x = 345,498,212,071.75/637,689.62
  6. Step 6: Final answer
    x = 541,796.83

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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.