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Finding the Fourth Proportional to 242.90, 335.31 and 233.54

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Solution

The fourth proportional to 242.90, 335.31 and 233.54 is: 322.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.90 : 335.31 = 233.54 : x
  2. Step 2: Convert to fraction form
    242.90/335.31 = 233.54/x
  3. Step 3: Cross multiply
    242.90x = 335.31 × 233.54
  4. Step 4: Simplify right side
    242.90x = 78,308.30
  5. Step 5: Solve for x
    x = 78,308.30/242.90
  6. Step 6: Final answer
    x = 322.39

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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.