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Finding the Fourth Proportional to 956.17, 1,432.39 and 455.13

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Solution

The fourth proportional to 956.17, 1,432.39 and 455.13 is: 681.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    956.17 : 1,432.39 = 455.13 : x
  2. Step 2: Convert to fraction form
    956.17/1,432.39 = 455.13/x
  3. Step 3: Cross multiply
    956.17x = 1,432.39 × 455.13
  4. Step 4: Simplify right side
    956.17x = 651,923.66
  5. Step 5: Solve for x
    x = 651,923.66/956.17
  6. Step 6: Final answer
    x = 681.81

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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.