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Finding the Fourth Proportional to 343.86, 474.40 and 203.98

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Solution

The fourth proportional to 343.86, 474.40 and 203.98 is: 281.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.86 : 474.40 = 203.98 : x
  2. Step 2: Convert to fraction form
    343.86/474.40 = 203.98/x
  3. Step 3: Cross multiply
    343.86x = 474.40 × 203.98
  4. Step 4: Simplify right side
    343.86x = 96,768.11
  5. Step 5: Solve for x
    x = 96,768.11/343.86
  6. Step 6: Final answer
    x = 281.42

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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.