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Finding the Fourth Proportional to 956.20, 1,432.38 and 613.48

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Solution

The fourth proportional to 956.20, 1,432.38 and 613.48 is: 918.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    956.20 : 1,432.38 = 613.48 : x
  2. Step 2: Convert to fraction form
    956.20/1,432.38 = 613.48/x
  3. Step 3: Cross multiply
    956.20x = 1,432.38 × 613.48
  4. Step 4: Simplify right side
    956.20x = 878,736.48
  5. Step 5: Solve for x
    x = 878,736.48/956.20
  6. Step 6: Final answer
    x = 918.99

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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.