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Finding the Fourth Proportional to 558.38, 767.95 and 447.68

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Solution

The fourth proportional to 558.38, 767.95 and 447.68 is: 615.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.38 : 767.95 = 447.68 : x
  2. Step 2: Convert to fraction form
    558.38/767.95 = 447.68/x
  3. Step 3: Cross multiply
    558.38x = 767.95 × 447.68
  4. Step 4: Simplify right side
    558.38x = 343,796.66
  5. Step 5: Solve for x
    x = 343,796.66/558.38
  6. Step 6: Final answer
    x = 615.70

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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.