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Finding the Fourth Proportional to 343.40, 473.90 and 203.47

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Solution

The fourth proportional to 343.40, 473.90 and 203.47 is: 280.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.40 : 473.90 = 203.47 : x
  2. Step 2: Convert to fraction form
    343.40/473.90 = 203.47/x
  3. Step 3: Cross multiply
    343.40x = 473.90 × 203.47
  4. Step 4: Simplify right side
    343.40x = 96,424.43
  5. Step 5: Solve for x
    x = 96,424.43/343.40
  6. Step 6: Final answer
    x = 280.79

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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.