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Finding the Fourth Proportional to 312.32, 467.76 and 247.76

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Solution

The fourth proportional to 312.32, 467.76 and 247.76 is: 371.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    312.32 : 467.76 = 247.76 : x
  2. Step 2: Convert to fraction form
    312.32/467.76 = 247.76/x
  3. Step 3: Cross multiply
    312.32x = 467.76 × 247.76
  4. Step 4: Simplify right side
    312.32x = 115,892.22
  5. Step 5: Solve for x
    x = 115,892.22/312.32
  6. Step 6: Final answer
    x = 371.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.