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Finding the Fourth Proportional to 549.55, 758.39 and 313.55

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Solution

The fourth proportional to 549.55, 758.39 and 313.55 is: 432.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.55 : 758.39 = 313.55 : x
  2. Step 2: Convert to fraction form
    549.55/758.39 = 313.55/x
  3. Step 3: Cross multiply
    549.55x = 758.39 × 313.55
  4. Step 4: Simplify right side
    549.55x = 237,793.18
  5. Step 5: Solve for x
    x = 237,793.18/549.55
  6. Step 6: Final answer
    x = 432.71

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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.