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Finding the Fourth Proportional to 291.76, 439.39 and 263.24

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Solution

The fourth proportional to 291.76, 439.39 and 263.24 is: 396.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.76 : 439.39 = 263.24 : x
  2. Step 2: Convert to fraction form
    291.76/439.39 = 263.24/x
  3. Step 3: Cross multiply
    291.76x = 439.39 × 263.24
  4. Step 4: Simplify right side
    291.76x = 115,665.02
  5. Step 5: Solve for x
    x = 115,665.02/291.76
  6. Step 6: Final answer
    x = 396.44

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.