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Finding the Fourth Proportional to 342.31, 472.29 and 202.29

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Solution

The fourth proportional to 342.31, 472.29 and 202.29 is: 279.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.31 : 472.29 = 202.29 : x
  2. Step 2: Convert to fraction form
    342.31/472.29 = 202.29/x
  3. Step 3: Cross multiply
    342.31x = 472.29 × 202.29
  4. Step 4: Simplify right side
    342.31x = 95,539.54
  5. Step 5: Solve for x
    x = 95,539.54/342.31
  6. Step 6: Final answer
    x = 279.10

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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.