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Finding the Fourth Proportional to 540.55, 746.04 and 393.13

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Solution

The fourth proportional to 540.55, 746.04 and 393.13 is: 542.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.55 : 746.04 = 393.13 : x
  2. Step 2: Convert to fraction form
    540.55/746.04 = 393.13/x
  3. Step 3: Cross multiply
    540.55x = 746.04 × 393.13
  4. Step 4: Simplify right side
    540.55x = 293,290.71
  5. Step 5: Solve for x
    x = 293,290.71/540.55
  6. Step 6: Final answer
    x = 542.58

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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.