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Finding the Fourth Proportional to 758.97, 1,139.67 and 635.45

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Solution

The fourth proportional to 758.97, 1,139.67 and 635.45 is: 954.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    758.97 : 1,139.67 = 635.45 : x
  2. Step 2: Convert to fraction form
    758.97/1,139.67 = 635.45/x
  3. Step 3: Cross multiply
    758.97x = 1,139.67 × 635.45
  4. Step 4: Simplify right side
    758.97x = 724,197.60
  5. Step 5: Solve for x
    x = 724,197.60/758.97
  6. Step 6: Final answer
    x = 954.18

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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.