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Finding the Fourth Proportional to 242.79, 335.08 and 144.54

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Solution

The fourth proportional to 242.79, 335.08 and 144.54 is: 199.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.79 : 335.08 = 144.54 : x
  2. Step 2: Convert to fraction form
    242.79/335.08 = 144.54/x
  3. Step 3: Cross multiply
    242.79x = 335.08 × 144.54
  4. Step 4: Simplify right side
    242.79x = 48,434.19
  5. Step 5: Solve for x
    x = 48,434.19/242.79
  6. Step 6: Final answer
    x = 199.49

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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.