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Finding the Fourth Proportional to 342.48, 472.62 and 187.23

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Solution

The fourth proportional to 342.48, 472.62 and 187.23 is: 258.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.48 : 472.62 = 187.23 : x
  2. Step 2: Convert to fraction form
    342.48/472.62 = 187.23/x
  3. Step 3: Cross multiply
    342.48x = 472.62 × 187.23
  4. Step 4: Simplify right side
    342.48x = 88,488.64
  5. Step 5: Solve for x
    x = 88,488.64/342.48
  6. Step 6: Final answer
    x = 258.38

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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.