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Finding the Fourth Proportional to 247.17, 370.75 and 102.90

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Solution

The fourth proportional to 247.17, 370.75 and 102.90 is: 154.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.17 : 370.75 = 102.90 : x
  2. Step 2: Convert to fraction form
    247.17/370.75 = 102.90/x
  3. Step 3: Cross multiply
    247.17x = 370.75 × 102.90
  4. Step 4: Simplify right side
    247.17x = 38,148.78
  5. Step 5: Solve for x
    x = 38,148.78/247.17
  6. Step 6: Final answer
    x = 154.34

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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.