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Finding the Fourth Proportional to 338,966.48, 508,452.60 and 86,247.20

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Solution

The fourth proportional to 338,966.48, 508,452.60 and 86,247.20 is: 129,371.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,966.48 : 508,452.60 = 86,247.20 : x
  2. Step 2: Convert to fraction form
    338,966.48/508,452.60 = 86,247.20/x
  3. Step 3: Cross multiply
    338,966.48x = 508,452.60 × 86,247.20
  4. Step 4: Simplify right side
    338,966.48x = 43,852,613,082.72
  5. Step 5: Solve for x
    x = 43,852,613,082.72/338,966.48
  6. Step 6: Final answer
    x = 129,371.53

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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.