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Finding the Fourth Proportional to 317.10, 437.30 and 243.56

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Solution

The fourth proportional to 317.10, 437.30 and 243.56 is: 335.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.10 : 437.30 = 243.56 : x
  2. Step 2: Convert to fraction form
    317.10/437.30 = 243.56/x
  3. Step 3: Cross multiply
    317.10x = 437.30 × 243.56
  4. Step 4: Simplify right side
    317.10x = 106,508.79
  5. Step 5: Solve for x
    x = 106,508.79/317.10
  6. Step 6: Final answer
    x = 335.88

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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.