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Finding the Fourth Proportional to 756.60, 1,131.84 and 655.02

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Solution

The fourth proportional to 756.60, 1,131.84 and 655.02 is: 979.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    756.60 : 1,131.84 = 655.02 : x
  2. Step 2: Convert to fraction form
    756.60/1,131.84 = 655.02/x
  3. Step 3: Cross multiply
    756.60x = 1,131.84 × 655.02
  4. Step 4: Simplify right side
    756.60x = 741,377.84
  5. Step 5: Solve for x
    x = 741,377.84/756.60
  6. Step 6: Final answer
    x = 979.88

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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.