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Finding the Fourth Proportional to 1,248.89, 1,722.19 and 751.43

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Solution

The fourth proportional to 1,248.89, 1,722.19 and 751.43 is: 1,036.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,248.89 : 1,722.19 = 751.43 : x
  2. Step 2: Convert to fraction form
    1,248.89/1,722.19 = 751.43/x
  3. Step 3: Cross multiply
    1,248.89x = 1,722.19 × 751.43
  4. Step 4: Simplify right side
    1,248.89x = 1,294,092.86
  5. Step 5: Solve for x
    x = 1,294,092.86/1,248.89
  6. Step 6: Final answer
    x = 1,036.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.