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Finding the Fourth Proportional to 248.87, 373.03 and 86.49

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Solution

The fourth proportional to 248.87, 373.03 and 86.49 is: 129.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.87 : 373.03 = 86.49 : x
  2. Step 2: Convert to fraction form
    248.87/373.03 = 86.49/x
  3. Step 3: Cross multiply
    248.87x = 373.03 × 86.49
  4. Step 4: Simplify right side
    248.87x = 32,263.15
  5. Step 5: Solve for x
    x = 32,263.15/248.87
  6. Step 6: Final answer
    x = 129.64

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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.