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Finding the Fourth Proportional to 582.12, 803.31 and 320.14

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Solution

The fourth proportional to 582.12, 803.31 and 320.14 is: 441.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    582.12 : 803.31 = 320.14 : x
  2. Step 2: Convert to fraction form
    582.12/803.31 = 320.14/x
  3. Step 3: Cross multiply
    582.12x = 803.31 × 320.14
  4. Step 4: Simplify right side
    582.12x = 257,169.66
  5. Step 5: Solve for x
    x = 257,169.66/582.12
  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.