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Finding the Fourth Proportional to 1,275.67, 1,913.73 and 789.27

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Solution

The fourth proportional to 1,275.67, 1,913.73 and 789.27 is: 1,184.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,275.67 : 1,913.73 = 789.27 : x
  2. Step 2: Convert to fraction form
    1,275.67/1,913.73 = 789.27/x
  3. Step 3: Cross multiply
    1,275.67x = 1,913.73 × 789.27
  4. Step 4: Simplify right side
    1,275.67x = 1,510,449.68
  5. Step 5: Solve for x
    x = 1,510,449.68/1,275.67
  6. Step 6: Final answer
    x = 1,184.04

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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.