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Finding the Fourth Proportional to 1,251.43, 1,877.14 and 521.52

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Solution

The fourth proportional to 1,251.43, 1,877.14 and 521.52 is: 782.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,251.43 : 1,877.14 = 521.52 : x
  2. Step 2: Convert to fraction form
    1,251.43/1,877.14 = 521.52/x
  3. Step 3: Cross multiply
    1,251.43x = 1,877.14 × 521.52
  4. Step 4: Simplify right side
    1,251.43x = 978,966.05
  5. Step 5: Solve for x
    x = 978,966.05/1,251.43
  6. Step 6: Final answer
    x = 782.28

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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.