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Finding the Fourth Proportional to 317.35, 437.25 and 243.43

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Solution

The fourth proportional to 317.35, 437.25 and 243.43 is: 335.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.35 : 437.25 = 243.43 : x
  2. Step 2: Convert to fraction form
    317.35/437.25 = 243.43/x
  3. Step 3: Cross multiply
    317.35x = 437.25 × 243.43
  4. Step 4: Simplify right side
    317.35x = 106,437.58
  5. Step 5: Solve for x
    x = 106,437.58/317.35
  6. Step 6: Final answer
    x = 335.40

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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.