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Finding the Fourth Proportional to 755.46, 1,135.17 and 708.75

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Solution

The fourth proportional to 755.46, 1,135.17 and 708.75 is: 1,064.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    755.46 : 1,135.17 = 708.75 : x
  2. Step 2: Convert to fraction form
    755.46/1,135.17 = 708.75/x
  3. Step 3: Cross multiply
    755.46x = 1,135.17 × 708.75
  4. Step 4: Simplify right side
    755.46x = 804,551.74
  5. Step 5: Solve for x
    x = 804,551.74/755.46
  6. Step 6: Final answer
    x = 1,064.98

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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.