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Finding the Fourth Proportional to 925.43, 1,275.76 and 571.11

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Solution

The fourth proportional to 925.43, 1,275.76 and 571.11 is: 787.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.43 : 1,275.76 = 571.11 : x
  2. Step 2: Convert to fraction form
    925.43/1,275.76 = 571.11/x
  3. Step 3: Cross multiply
    925.43x = 1,275.76 × 571.11
  4. Step 4: Simplify right side
    925.43x = 728,597.87
  5. Step 5: Solve for x
    x = 728,597.87/925.43
  6. Step 6: Final answer
    x = 787.31

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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.