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Finding the Fourth Proportional to 798.52, 1,197.78 and 311.62

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Solution

The fourth proportional to 798.52, 1,197.78 and 311.62 is: 467.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    798.52 : 1,197.78 = 311.62 : x
  2. Step 2: Convert to fraction form
    798.52/1,197.78 = 311.62/x
  3. Step 3: Cross multiply
    798.52x = 1,197.78 × 311.62
  4. Step 4: Simplify right side
    798.52x = 373,252.20
  5. Step 5: Solve for x
    x = 373,252.20/798.52
  6. Step 6: Final answer
    x = 467.43

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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.