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Finding the Fourth Proportional to 1,248.14, 1,722.80 and 750.80

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Solution

The fourth proportional to 1,248.14, 1,722.80 and 750.80 is: 1,036.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,248.14 : 1,722.80 = 750.80 : x
  2. Step 2: Convert to fraction form
    1,248.14/1,722.80 = 750.80/x
  3. Step 3: Cross multiply
    1,248.14x = 1,722.80 × 750.80
  4. Step 4: Simplify right side
    1,248.14x = 1,293,484.42
  5. Step 5: Solve for x
    x = 1,293,484.42/1,248.14
  6. Step 6: Final answer
    x = 1,036.33

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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.