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Finding the Fourth Proportional to 912.81, 1,260.07 and 773.67

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Solution

The fourth proportional to 912.81, 1,260.07 and 773.67 is: 1,067.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    912.81 : 1,260.07 = 773.67 : x
  2. Step 2: Convert to fraction form
    912.81/1,260.07 = 773.67/x
  3. Step 3: Cross multiply
    912.81x = 1,260.07 × 773.67
  4. Step 4: Simplify right side
    912.81x = 974,876.42
  5. Step 5: Solve for x
    x = 974,876.42/912.81
  6. Step 6: Final answer
    x = 1,067.99

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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.