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Finding the Fourth Proportional to 342.76, 472.62 and 272.68

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Solution

The fourth proportional to 342.76, 472.62 and 272.68 is: 375.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.76 : 472.62 = 272.68 : x
  2. Step 2: Convert to fraction form
    342.76/472.62 = 272.68/x
  3. Step 3: Cross multiply
    342.76x = 472.62 × 272.68
  4. Step 4: Simplify right side
    342.76x = 128,874.02
  5. Step 5: Solve for x
    x = 128,874.02/342.76
  6. Step 6: Final answer
    x = 375.99

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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.