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Finding the Fourth Proportional to 342.19, 472.02 and 248.81

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Solution

The fourth proportional to 342.19, 472.02 and 248.81 is: 343.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.19 : 472.02 = 248.81 : x
  2. Step 2: Convert to fraction form
    342.19/472.02 = 248.81/x
  3. Step 3: Cross multiply
    342.19x = 472.02 × 248.81
  4. Step 4: Simplify right side
    342.19x = 117,443.30
  5. Step 5: Solve for x
    x = 117,443.30/342.19
  6. Step 6: Final answer
    x = 343.21

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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.