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Finding the Fourth Proportional to 247.19, 370.17 and 139.05

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Solution

The fourth proportional to 247.19, 370.17 and 139.05 is: 208.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.19 : 370.17 = 139.05 : x
  2. Step 2: Convert to fraction form
    247.19/370.17 = 139.05/x
  3. Step 3: Cross multiply
    247.19x = 370.17 × 139.05
  4. Step 4: Simplify right side
    247.19x = 51,472.14
  5. Step 5: Solve for x
    x = 51,472.14/247.19
  6. Step 6: Final answer
    x = 208.23

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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.