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Finding the Fourth Proportional to 338,959.94, 508,442.92 and 86,240.74

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Solution

The fourth proportional to 338,959.94, 508,442.92 and 86,240.74 is: 129,361.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,959.94 : 508,442.92 = 86,240.74 : x
  2. Step 2: Convert to fraction form
    338,959.94/508,442.92 = 86,240.74/x
  3. Step 3: Cross multiply
    338,959.94x = 508,442.92 × 86,240.74
  4. Step 4: Simplify right side
    338,959.94x = 43,848,493,668.56
  5. Step 5: Solve for x
    x = 43,848,493,668.56/338,959.94
  6. Step 6: Final answer
    x = 129,361.88

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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.