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Finding the Fourth Proportional to 425.80, 636.11 and 270.48

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Solution

The fourth proportional to 425.80, 636.11 and 270.48 is: 404.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    425.80 : 636.11 = 270.48 : x
  2. Step 2: Convert to fraction form
    425.80/636.11 = 270.48/x
  3. Step 3: Cross multiply
    425.80x = 636.11 × 270.48
  4. Step 4: Simplify right side
    425.80x = 172,054.69
  5. Step 5: Solve for x
    x = 172,054.69/425.80
  6. Step 6: Final answer
    x = 404.08

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.