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Finding the Fourth Proportional to 317.44, 440.24 and 306.48

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Solution

The fourth proportional to 317.44, 440.24 and 306.48 is: 425.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.44 : 440.24 = 306.48 : x
  2. Step 2: Convert to fraction form
    317.44/440.24 = 306.48/x
  3. Step 3: Cross multiply
    317.44x = 440.24 × 306.48
  4. Step 4: Simplify right side
    317.44x = 134,924.76
  5. Step 5: Solve for x
    x = 134,924.76/317.44
  6. Step 6: Final answer
    x = 425.04

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.