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Finding the Fourth Proportional to 927.91, 1,390.66 and 694.97

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Solution

The fourth proportional to 927.91, 1,390.66 and 694.97 is: 1,041.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    927.91 : 1,390.66 = 694.97 : x
  2. Step 2: Convert to fraction form
    927.91/1,390.66 = 694.97/x
  3. Step 3: Cross multiply
    927.91x = 1,390.66 × 694.97
  4. Step 4: Simplify right side
    927.91x = 966,466.98
  5. Step 5: Solve for x
    x = 966,466.98/927.91
  6. Step 6: Final answer
    x = 1,041.55

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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.