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Finding the Fourth Proportional to 621,706.43, 932,559.58 and 172,427.28

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Solution

The fourth proportional to 621,706.43, 932,559.58 and 172,427.28 is: 258,640.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,706.43 : 932,559.58 = 172,427.28 : x
  2. Step 2: Convert to fraction form
    621,706.43/932,559.58 = 172,427.28/x
  3. Step 3: Cross multiply
    621,706.43x = 932,559.58 × 172,427.28
  4. Step 4: Simplify right side
    621,706.43x = 160,798,711,817.34
  5. Step 5: Solve for x
    x = 160,798,711,817.34/621,706.43
  6. Step 6: Final answer
    x = 258,640.90

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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.