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Finding the Fourth Proportional to 248.87, 373.48 and 86.56

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Solution

The fourth proportional to 248.87, 373.48 and 86.56 is: 129.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.87 : 373.48 = 86.56 : x
  2. Step 2: Convert to fraction form
    248.87/373.48 = 86.56/x
  3. Step 3: Cross multiply
    248.87x = 373.48 × 86.56
  4. Step 4: Simplify right side
    248.87x = 32,327.28
  5. Step 5: Solve for x
    x = 32,327.28/248.87
  6. Step 6: Final answer
    x = 129.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.