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Finding the Fourth Proportional to 343.80, 474.28 and 250.40

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Solution

The fourth proportional to 343.80, 474.28 and 250.40 is: 345.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.80 : 474.28 = 250.40 : x
  2. Step 2: Convert to fraction form
    343.80/474.28 = 250.40/x
  3. Step 3: Cross multiply
    343.80x = 474.28 × 250.40
  4. Step 4: Simplify right side
    343.80x = 118,759.71
  5. Step 5: Solve for x
    x = 118,759.71/343.80
  6. Step 6: Final answer
    x = 345.43

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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.