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Finding the Fourth Proportional to 341.47, 471.18 and 217.20

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Solution

The fourth proportional to 341.47, 471.18 and 217.20 is: 299.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    341.47 : 471.18 = 217.20 : x
  2. Step 2: Convert to fraction form
    341.47/471.18 = 217.20/x
  3. Step 3: Cross multiply
    341.47x = 471.18 × 217.20
  4. Step 4: Simplify right side
    341.47x = 102,340.30
  5. Step 5: Solve for x
    x = 102,340.30/341.47
  6. Step 6: Final answer
    x = 299.71

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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.