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Finding the Fourth Proportional to 925.66, 1,387.79 and 560.36

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Solution

The fourth proportional to 925.66, 1,387.79 and 560.36 is: 840.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.66 : 1,387.79 = 560.36 : x
  2. Step 2: Convert to fraction form
    925.66/1,387.79 = 560.36/x
  3. Step 3: Cross multiply
    925.66x = 1,387.79 × 560.36
  4. Step 4: Simplify right side
    925.66x = 777,656.47
  5. Step 5: Solve for x
    x = 777,656.47/925.66
  6. Step 6: Final answer
    x = 840.11

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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.