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Finding the Fourth Proportional to 956.56, 1,425.04 and 921.72

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Solution

The fourth proportional to 956.56, 1,425.04 and 921.72 is: 1,373.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    956.56 : 1,425.04 = 921.72 : x
  2. Step 2: Convert to fraction form
    956.56/1,425.04 = 921.72/x
  3. Step 3: Cross multiply
    956.56x = 1,425.04 × 921.72
  4. Step 4: Simplify right side
    956.56x = 1,313,487.87
  5. Step 5: Solve for x
    x = 1,313,487.87/956.56
  6. Step 6: Final answer
    x = 1,373.14

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.