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Finding the Fourth Proportional to 438,987.39, 658,178.50 and 172,778.47

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Solution

The fourth proportional to 438,987.39, 658,178.50 and 172,778.47 is: 259,048.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,987.39 : 658,178.50 = 172,778.47 : x
  2. Step 2: Convert to fraction form
    438,987.39/658,178.50 = 172,778.47/x
  3. Step 3: Cross multiply
    438,987.39x = 658,178.50 × 172,778.47
  4. Step 4: Simplify right side
    438,987.39x = 113,719,070,062.11
  5. Step 5: Solve for x
    x = 113,719,070,062.11/438,987.39
  6. Step 6: Final answer
    x = 259,048.61

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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.