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Finding the Fourth Proportional to 498.12, 685.92 and 427.64

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Solution

The fourth proportional to 498.12, 685.92 and 427.64 is: 588.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.12 : 685.92 = 427.64 : x
  2. Step 2: Convert to fraction form
    498.12/685.92 = 427.64/x
  3. Step 3: Cross multiply
    498.12x = 685.92 × 427.64
  4. Step 4: Simplify right side
    498.12x = 293,326.83
  5. Step 5: Solve for x
    x = 293,326.83/498.12
  6. Step 6: Final answer
    x = 588.87

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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.