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Finding the Fourth Proportional to 252,434.52, 378,689.46 and 74,920.56

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Solution

The fourth proportional to 252,434.52, 378,689.46 and 74,920.56 is: 112,392.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,434.52 : 378,689.46 = 74,920.56 : x
  2. Step 2: Convert to fraction form
    252,434.52/378,689.46 = 74,920.56/x
  3. Step 3: Cross multiply
    252,434.52x = 378,689.46 × 74,920.56
  4. Step 4: Simplify right side
    252,434.52x = 28,371,626,409.30
  5. Step 5: Solve for x
    x = 28,371,626,409.30/252,434.52
  6. Step 6: Final answer
    x = 112,392.02

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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.