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Finding the Fourth Proportional to 342.48, 472.65 and 195.15

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Solution

The fourth proportional to 342.48, 472.65 and 195.15 is: 269.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.48 : 472.65 = 195.15 : x
  2. Step 2: Convert to fraction form
    342.48/472.65 = 195.15/x
  3. Step 3: Cross multiply
    342.48x = 472.65 × 195.15
  4. Step 4: Simplify right side
    342.48x = 92,237.65
  5. Step 5: Solve for x
    x = 92,237.65/342.48
  6. Step 6: Final answer
    x = 269.32

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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.