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Finding the Fourth Proportional to 459.80, 634.31 and 320.24

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Solution

The fourth proportional to 459.80, 634.31 and 320.24 is: 441.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    459.80 : 634.31 = 320.24 : x
  2. Step 2: Convert to fraction form
    459.80/634.31 = 320.24/x
  3. Step 3: Cross multiply
    459.80x = 634.31 × 320.24
  4. Step 4: Simplify right side
    459.80x = 203,126.66
  5. Step 5: Solve for x
    x = 203,126.66/459.80
  6. Step 6: Final answer
    x = 441.78

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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.