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Finding the Fourth Proportional to 253,046.40, 379,687.68 and 112,790.40

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Solution

The fourth proportional to 253,046.40, 379,687.68 and 112,790.40 is: 169,238.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,046.40 : 379,687.68 = 112,790.40 : x
  2. Step 2: Convert to fraction form
    253,046.40/379,687.68 = 112,790.40/x
  3. Step 3: Cross multiply
    253,046.40x = 379,687.68 × 112,790.40
  4. Step 4: Simplify right side
    253,046.40x = 42,825,125,302.27
  5. Step 5: Solve for x
    x = 42,825,125,302.27/253,046.40
  6. Step 6: Final answer
    x = 169,238.23

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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.