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Finding the Fourth Proportional to 242.90, 335.37 and 154.51

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Solution

The fourth proportional to 242.90, 335.37 and 154.51 is: 213.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.90 : 335.37 = 154.51 : x
  2. Step 2: Convert to fraction form
    242.90/335.37 = 154.51/x
  3. Step 3: Cross multiply
    242.90x = 335.37 × 154.51
  4. Step 4: Simplify right side
    242.90x = 51,817.76
  5. Step 5: Solve for x
    x = 51,817.76/242.90
  6. Step 6: Final answer
    x = 213.33

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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.