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Finding the Fourth Proportional to 994.91, 1,372.96 and 540.66

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Solution

The fourth proportional to 994.91, 1,372.96 and 540.66 is: 746.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    994.91 : 1,372.96 = 540.66 : x
  2. Step 2: Convert to fraction form
    994.91/1,372.96 = 540.66/x
  3. Step 3: Cross multiply
    994.91x = 1,372.96 × 540.66
  4. Step 4: Simplify right side
    994.91x = 742,304.55
  5. Step 5: Solve for x
    x = 742,304.55/994.91
  6. Step 6: Final answer
    x = 746.11

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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.