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Finding the Fourth Proportional to 1,327.11, 1,990.68 and 460.82

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Solution

The fourth proportional to 1,327.11, 1,990.68 and 460.82 is: 691.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,327.11 : 1,990.68 = 460.82 : x
  2. Step 2: Convert to fraction form
    1,327.11/1,990.68 = 460.82/x
  3. Step 3: Cross multiply
    1,327.11x = 1,990.68 × 460.82
  4. Step 4: Simplify right side
    1,327.11x = 917,332.90
  5. Step 5: Solve for x
    x = 917,332.90/1,327.11
  6. Step 6: Final answer
    x = 691.23

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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.