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Finding the Fourth Proportional to 1,327.65, 1,991.82 and 505.95

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Solution

The fourth proportional to 1,327.65, 1,991.82 and 505.95 is: 759.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,327.65 : 1,991.82 = 505.95 : x
  2. Step 2: Convert to fraction form
    1,327.65/1,991.82 = 505.95/x
  3. Step 3: Cross multiply
    1,327.65x = 1,991.82 × 505.95
  4. Step 4: Simplify right side
    1,327.65x = 1,007,761.33
  5. Step 5: Solve for x
    x = 1,007,761.33/1,327.65
  6. Step 6: Final answer
    x = 759.06

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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.