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Finding the Fourth Proportional to 766.96, 1,059.16 and 655.79

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Solution

The fourth proportional to 766.96, 1,059.16 and 655.79 is: 905.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    766.96 : 1,059.16 = 655.79 : x
  2. Step 2: Convert to fraction form
    766.96/1,059.16 = 655.79/x
  3. Step 3: Cross multiply
    766.96x = 1,059.16 × 655.79
  4. Step 4: Simplify right side
    766.96x = 694,586.54
  5. Step 5: Solve for x
    x = 694,586.54/766.96
  6. Step 6: Final answer
    x = 905.64

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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.