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Finding the Fourth Proportional to 341.20, 471.36 and 315.28

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Solution

The fourth proportional to 341.20, 471.36 and 315.28 is: 435.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    341.20 : 471.36 = 315.28 : x
  2. Step 2: Convert to fraction form
    341.20/471.36 = 315.28/x
  3. Step 3: Cross multiply
    341.20x = 471.36 × 315.28
  4. Step 4: Simplify right side
    341.20x = 148,610.38
  5. Step 5: Solve for x
    x = 148,610.38/341.20
  6. Step 6: Final answer
    x = 435.55

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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.