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Finding the Fourth Proportional to 342.77, 472.88 and 211.85

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Solution

The fourth proportional to 342.77, 472.88 and 211.85 is: 292.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.77 : 472.88 = 211.85 : x
  2. Step 2: Convert to fraction form
    342.77/472.88 = 211.85/x
  3. Step 3: Cross multiply
    342.77x = 472.88 × 211.85
  4. Step 4: Simplify right side
    342.77x = 100,176.20
  5. Step 5: Solve for x
    x = 100,176.20/342.77
  6. Step 6: Final answer
    x = 292.26

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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.