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Finding the Fourth Proportional to 144.79, 216 and 140.37

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Solution

The fourth proportional to 144.79, 216 and 140.37 is: 209.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.79 : 216 = 140.37 : x
  2. Step 2: Convert to fraction form
    144.79/216 = 140.37/x
  3. Step 3: Cross multiply
    144.79x = 216 × 140.37
  4. Step 4: Simplify right side
    144.79x = 30,319.11
  5. Step 5: Solve for x
    x = 30,319.11/144.79
  6. Step 6: Final answer
    x = 209.40

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.