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Finding the Fourth Proportional to 438,882.72, 658,256.85 and 139,324.20

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Solution

The fourth proportional to 438,882.72, 658,256.85 and 139,324.20 is: 208,964.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,882.72 : 658,256.85 = 139,324.20 : x
  2. Step 2: Convert to fraction form
    438,882.72/658,256.85 = 139,324.20/x
  3. Step 3: Cross multiply
    438,882.72x = 658,256.85 × 139,324.20
  4. Step 4: Simplify right side
    438,882.72x = 91,711,109,020.77
  5. Step 5: Solve for x
    x = 91,711,109,020.77/438,882.72
  6. Step 6: Final answer
    x = 208,964.96

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1.5x scale

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.