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Finding the Fourth Proportional to 458.60, 632.84 and 311.27

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Solution

The fourth proportional to 458.60, 632.84 and 311.27 is: 429.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    458.60 : 632.84 = 311.27 : x
  2. Step 2: Convert to fraction form
    458.60/632.84 = 311.27/x
  3. Step 3: Cross multiply
    458.60x = 632.84 × 311.27
  4. Step 4: Simplify right side
    458.60x = 196,979.39
  5. Step 5: Solve for x
    x = 196,979.39/458.60
  6. Step 6: Final answer
    x = 429.53

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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.