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Finding the Fourth Proportional to 237.47, 327.78 and 139.22

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Solution

The fourth proportional to 237.47, 327.78 and 139.22 is: 192.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    237.47 : 327.78 = 139.22 : x
  2. Step 2: Convert to fraction form
    237.47/327.78 = 139.22/x
  3. Step 3: Cross multiply
    237.47x = 327.78 × 139.22
  4. Step 4: Simplify right side
    237.47x = 45,633.12
  5. Step 5: Solve for x
    x = 45,633.12/237.47
  6. Step 6: Final answer
    x = 192.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.