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Finding the Fourth Proportional to 929.52, 1,387.71 and 799.56

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Solution

The fourth proportional to 929.52, 1,387.71 and 799.56 is: 1,193.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    929.52 : 1,387.71 = 799.56 : x
  2. Step 2: Convert to fraction form
    929.52/1,387.71 = 799.56/x
  3. Step 3: Cross multiply
    929.52x = 1,387.71 × 799.56
  4. Step 4: Simplify right side
    929.52x = 1,109,557.41
  5. Step 5: Solve for x
    x = 1,109,557.41/929.52
  6. Step 6: Final answer
    x = 1,193.69

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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.