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Finding the Fourth Proportional to 425.75, 587.48 and 248.76

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Solution

The fourth proportional to 425.75, 587.48 and 248.76 is: 343.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    425.75 : 587.48 = 248.76 : x
  2. Step 2: Convert to fraction form
    425.75/587.48 = 248.76/x
  3. Step 3: Cross multiply
    425.75x = 587.48 × 248.76
  4. Step 4: Simplify right side
    425.75x = 146,140.28
  5. Step 5: Solve for x
    x = 146,140.28/425.75
  6. Step 6: Final answer
    x = 343.26

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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.