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Finding the Fourth Proportional to 956.73, 1,321.11 and 925.77

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Solution

The fourth proportional to 956.73, 1,321.11 and 925.77 is: 1,278.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    956.73 : 1,321.11 = 925.77 : x
  2. Step 2: Convert to fraction form
    956.73/1,321.11 = 925.77/x
  3. Step 3: Cross multiply
    956.73x = 1,321.11 × 925.77
  4. Step 4: Simplify right side
    956.73x = 1,223,044.00
  5. Step 5: Solve for x
    x = 1,223,044.00/956.73
  6. Step 6: Final answer
    x = 1,278.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.