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Finding the Fourth Proportional to 248.16, 372.16 and 77.16

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Solution

The fourth proportional to 248.16, 372.16 and 77.16 is: 115.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.16 : 372.16 = 77.16 : x
  2. Step 2: Convert to fraction form
    248.16/372.16 = 77.16/x
  3. Step 3: Cross multiply
    248.16x = 372.16 × 77.16
  4. Step 4: Simplify right side
    248.16x = 28,715.87
  5. Step 5: Solve for x
    x = 28,715.87/248.16
  6. Step 6: Final answer
    x = 115.72

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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.