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Finding the Fourth Proportional to 540.98, 746.24 and 393.44

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Solution

The fourth proportional to 540.98, 746.24 and 393.44 is: 542.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.98 : 746.24 = 393.44 : x
  2. Step 2: Convert to fraction form
    540.98/746.24 = 393.44/x
  3. Step 3: Cross multiply
    540.98x = 746.24 × 393.44
  4. Step 4: Simplify right side
    540.98x = 293,600.67
  5. Step 5: Solve for x
    x = 293,600.67/540.98
  6. Step 6: Final answer
    x = 542.72

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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.