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Finding the Fourth Proportional to 371.24, 556.37 and 139.92

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Solution

The fourth proportional to 371.24, 556.37 and 139.92 is: 209.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.24 : 556.37 = 139.92 : x
  2. Step 2: Convert to fraction form
    371.24/556.37 = 139.92/x
  3. Step 3: Cross multiply
    371.24x = 556.37 × 139.92
  4. Step 4: Simplify right side
    371.24x = 77,847.29
  5. Step 5: Solve for x
    x = 77,847.29/371.24
  6. Step 6: Final answer
    x = 209.70

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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.