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Finding the Fourth Proportional to 343.20, 473.52 and 255.72

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Solution

The fourth proportional to 343.20, 473.52 and 255.72 is: 352.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.20 : 473.52 = 255.72 : x
  2. Step 2: Convert to fraction form
    343.20/473.52 = 255.72/x
  3. Step 3: Cross multiply
    343.20x = 473.52 × 255.72
  4. Step 4: Simplify right side
    343.20x = 121,088.53
  5. Step 5: Solve for x
    x = 121,088.53/343.20
  6. Step 6: Final answer
    x = 352.82

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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.