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Finding the Fourth Proportional to 342.69, 472.87 and 202.81

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Solution

The fourth proportional to 342.69, 472.87 and 202.81 is: 279.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.69 : 472.87 = 202.81 : x
  2. Step 2: Convert to fraction form
    342.69/472.87 = 202.81/x
  3. Step 3: Cross multiply
    342.69x = 472.87 × 202.81
  4. Step 4: Simplify right side
    342.69x = 95,902.76
  5. Step 5: Solve for x
    x = 95,902.76/342.69
  6. Step 6: Final answer
    x = 279.85

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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.