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Finding the Fourth Proportional to 549.43, 757.98 and 339.55

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Solution

The fourth proportional to 549.43, 757.98 and 339.55 is: 468.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.43 : 757.98 = 339.55 : x
  2. Step 2: Convert to fraction form
    549.43/757.98 = 339.55/x
  3. Step 3: Cross multiply
    549.43x = 757.98 × 339.55
  4. Step 4: Simplify right side
    549.43x = 257,370.21
  5. Step 5: Solve for x
    x = 257,370.21/549.43
  6. Step 6: Final answer
    x = 468.43

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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.