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Finding the Fourth Proportional to 374.20, 516.51 and 243.21

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Solution

The fourth proportional to 374.20, 516.51 and 243.21 is: 335.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.20 : 516.51 = 243.21 : x
  2. Step 2: Convert to fraction form
    374.20/516.51 = 243.21/x
  3. Step 3: Cross multiply
    374.20x = 516.51 × 243.21
  4. Step 4: Simplify right side
    374.20x = 125,620.40
  5. Step 5: Solve for x
    x = 125,620.40/374.20
  6. Step 6: Final answer
    x = 335.70

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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.