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Finding the Fourth Proportional to 237.80, 328.19 and 139.64

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Solution

The fourth proportional to 237.80, 328.19 and 139.64 is: 192.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    237.80 : 328.19 = 139.64 : x
  2. Step 2: Convert to fraction form
    237.80/328.19 = 139.64/x
  3. Step 3: Cross multiply
    237.80x = 328.19 × 139.64
  4. Step 4: Simplify right side
    237.80x = 45,826.11
  5. Step 5: Solve for x
    x = 45,826.11/237.80
  6. Step 6: Final answer
    x = 192.71

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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.