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Finding the Fourth Proportional to 758.70, 1,135.30 and 627.48

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Solution

The fourth proportional to 758.70, 1,135.30 and 627.48 is: 938.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    758.70 : 1,135.30 = 627.48 : x
  2. Step 2: Convert to fraction form
    758.70/1,135.30 = 627.48/x
  3. Step 3: Cross multiply
    758.70x = 1,135.30 × 627.48
  4. Step 4: Simplify right side
    758.70x = 712,378.04
  5. Step 5: Solve for x
    x = 712,378.04/758.70
  6. Step 6: Final answer
    x = 938.95

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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.