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Finding the Fourth Proportional to 438,751.69, 658,044.27 and 213,885.97

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Solution

The fourth proportional to 438,751.69, 658,044.27 and 213,885.97 is: 320,788.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,751.69 : 658,044.27 = 213,885.97 : x
  2. Step 2: Convert to fraction form
    438,751.69/658,044.27 = 213,885.97/x
  3. Step 3: Cross multiply
    438,751.69x = 658,044.27 × 213,885.97
  4. Step 4: Simplify right side
    438,751.69x = 140,746,435,346.78
  5. Step 5: Solve for x
    x = 140,746,435,346.78/438,751.69
  6. Step 6: Final answer
    x = 320,788.36

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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.