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Finding the Fourth Proportional to 343.15, 473.38 and 203.20

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Solution

The fourth proportional to 343.15, 473.38 and 203.20 is: 280.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.15 : 473.38 = 203.20 : x
  2. Step 2: Convert to fraction form
    343.15/473.38 = 203.20/x
  3. Step 3: Cross multiply
    343.15x = 473.38 × 203.20
  4. Step 4: Simplify right side
    343.15x = 96,189.80
  5. Step 5: Solve for x
    x = 96,189.80/343.15
  6. Step 6: Final answer
    x = 280.31

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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.