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Finding the Fourth Proportional to 925.29, 1,276.79 and 571.29

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Solution

The fourth proportional to 925.29, 1,276.79 and 571.29 is: 788.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.29 : 1,276.79 = 571.29 : x
  2. Step 2: Convert to fraction form
    925.29/1,276.79 = 571.29/x
  3. Step 3: Cross multiply
    925.29x = 1,276.79 × 571.29
  4. Step 4: Simplify right side
    925.29x = 729,414.50
  5. Step 5: Solve for x
    x = 729,414.50/925.29
  6. Step 6: Final answer
    x = 788.31

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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.