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Finding the Fourth Proportional to 981.52, 1,474.55 and 635.55

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Solution

The fourth proportional to 981.52, 1,474.55 and 635.55 is: 954.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    981.52 : 1,474.55 = 635.55 : x
  2. Step 2: Convert to fraction form
    981.52/1,474.55 = 635.55/x
  3. Step 3: Cross multiply
    981.52x = 1,474.55 × 635.55
  4. Step 4: Simplify right side
    981.52x = 937,147.50
  5. Step 5: Solve for x
    x = 937,147.50/981.52
  6. Step 6: Final answer
    x = 954.79

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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.