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Finding the Fourth Proportional to 756.88, 1,134.36 and 659.20

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Solution

The fourth proportional to 756.88, 1,134.36 and 659.20 is: 987.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    756.88 : 1,134.36 = 659.20 : x
  2. Step 2: Convert to fraction form
    756.88/1,134.36 = 659.20/x
  3. Step 3: Cross multiply
    756.88x = 1,134.36 × 659.20
  4. Step 4: Simplify right side
    756.88x = 747,770.11
  5. Step 5: Solve for x
    x = 747,770.11/756.88
  6. Step 6: Final answer
    x = 987.96

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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.