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Finding the Fourth Proportional to 460.80, 636.06 and 311.46

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Solution

The fourth proportional to 460.80, 636.06 and 311.46 is: 429.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    460.80 : 636.06 = 311.46 : x
  2. Step 2: Convert to fraction form
    460.80/636.06 = 311.46/x
  3. Step 3: Cross multiply
    460.80x = 636.06 × 311.46
  4. Step 4: Simplify right side
    460.80x = 198,107.25
  5. Step 5: Solve for x
    x = 198,107.25/460.80
  6. Step 6: Final answer
    x = 429.92

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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.