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Finding the Fourth Proportional to 1,252.31, 1,875.73 and 763.88

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Solution

The fourth proportional to 1,252.31, 1,875.73 and 763.88 is: 1,144.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,252.31 : 1,875.73 = 763.88 : x
  2. Step 2: Convert to fraction form
    1,252.31/1,875.73 = 763.88/x
  3. Step 3: Cross multiply
    1,252.31x = 1,875.73 × 763.88
  4. Step 4: Simplify right side
    1,252.31x = 1,432,826.03
  5. Step 5: Solve for x
    x = 1,432,826.03/1,252.31
  6. Step 6: Final answer
    x = 1,144.15

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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.