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Finding the Fourth Proportional to 242.93, 335.12 and 154.25

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Solution

The fourth proportional to 242.93, 335.12 and 154.25 is: 212.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.93 : 335.12 = 154.25 : x
  2. Step 2: Convert to fraction form
    242.93/335.12 = 154.25/x
  3. Step 3: Cross multiply
    242.93x = 335.12 × 154.25
  4. Step 4: Simplify right side
    242.93x = 51,692.33
  5. Step 5: Solve for x
    x = 51,692.33/242.93
  6. Step 6: Final answer
    x = 212.79

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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.