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Finding the Fourth Proportional to 1,324.07, 1,986.08 and 779.71

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Solution

The fourth proportional to 1,324.07, 1,986.08 and 779.71 is: 1,169.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,324.07 : 1,986.08 = 779.71 : x
  2. Step 2: Convert to fraction form
    1,324.07/1,986.08 = 779.71/x
  3. Step 3: Cross multiply
    1,324.07x = 1,986.08 × 779.71
  4. Step 4: Simplify right side
    1,324.07x = 1,548,563.42
  5. Step 5: Solve for x
    x = 1,548,563.42/1,324.07
  6. Step 6: Final answer
    x = 1,169.55

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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.