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Finding the Fourth Proportional to 541.19, 747 and 391.92

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Solution

The fourth proportional to 541.19, 747 and 391.92 is: 540.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    541.19 : 747 = 391.92 : x
  2. Step 2: Convert to fraction form
    541.19/747 = 391.92/x
  3. Step 3: Cross multiply
    541.19x = 747 × 391.92
  4. Step 4: Simplify right side
    541.19x = 292,764.24
  5. Step 5: Solve for x
    x = 292,764.24/541.19
  6. Step 6: Final answer
    x = 540.97

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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.