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Finding the Fourth Proportional to 881.38, 1,320.84 and 750.70

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Solution

The fourth proportional to 881.38, 1,320.84 and 750.70 is: 1,125.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.38 : 1,320.84 = 750.70 : x
  2. Step 2: Convert to fraction form
    881.38/1,320.84 = 750.70/x
  3. Step 3: Cross multiply
    881.38x = 1,320.84 × 750.70
  4. Step 4: Simplify right side
    881.38x = 991,554.59
  5. Step 5: Solve for x
    x = 991,554.59/881.38
  6. Step 6: Final answer
    x = 1,125.00

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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.