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Finding the Fourth Proportional to 317.21, 437.95 and 243.39

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Solution

The fourth proportional to 317.21, 437.95 and 243.39 is: 336.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.21 : 437.95 = 243.39 : x
  2. Step 2: Convert to fraction form
    317.21/437.95 = 243.39/x
  3. Step 3: Cross multiply
    317.21x = 437.95 × 243.39
  4. Step 4: Simplify right side
    317.21x = 106,590.46
  5. Step 5: Solve for x
    x = 106,590.46/317.21
  6. Step 6: Final answer
    x = 336.02

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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.