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Finding the Fourth Proportional to 1,248.57, 1,871.22 and 517.95

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Solution

The fourth proportional to 1,248.57, 1,871.22 and 517.95 is: 776.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,248.57 : 1,871.22 = 517.95 : x
  2. Step 2: Convert to fraction form
    1,248.57/1,871.22 = 517.95/x
  3. Step 3: Cross multiply
    1,248.57x = 1,871.22 × 517.95
  4. Step 4: Simplify right side
    1,248.57x = 969,198.40
  5. Step 5: Solve for x
    x = 969,198.40/1,248.57
  6. Step 6: Final answer
    x = 776.25

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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.