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Finding the Fourth Proportional to 621,704.88, 932,557.27 and 172,425.74

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Solution

The fourth proportional to 621,704.88, 932,557.27 and 172,425.74 is: 258,638.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,704.88 : 932,557.27 = 172,425.74 : x
  2. Step 2: Convert to fraction form
    621,704.88/932,557.27 = 172,425.74/x
  3. Step 3: Cross multiply
    621,704.88x = 932,557.27 × 172,425.74
  4. Step 4: Simplify right side
    621,704.88x = 160,796,877,372.13
  5. Step 5: Solve for x
    x = 160,796,877,372.13/621,704.88
  6. Step 6: Final answer
    x = 258,638.60

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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.