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Finding the Fourth Proportional to 642,522.72, 886,678.96 and 356,042.57

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Solution

The fourth proportional to 642,522.72, 886,678.96 and 356,042.57 is: 491,337.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,522.72 : 886,678.96 = 356,042.57 : x
  2. Step 2: Convert to fraction form
    642,522.72/886,678.96 = 356,042.57/x
  3. Step 3: Cross multiply
    642,522.72x = 886,678.96 × 356,042.57
  4. Step 4: Simplify right side
    642,522.72x = 315,695,455,683.33
  5. Step 5: Solve for x
    x = 315,695,455,683.33/642,522.72
  6. Step 6: Final answer
    x = 491,337.42

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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.