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Finding the Fourth Proportional to 766.80, 1,057.73 and 734.67

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Solution

The fourth proportional to 766.80, 1,057.73 and 734.67 is: 1,013.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    766.80 : 1,057.73 = 734.67 : x
  2. Step 2: Convert to fraction form
    766.80/1,057.73 = 734.67/x
  3. Step 3: Cross multiply
    766.80x = 1,057.73 × 734.67
  4. Step 4: Simplify right side
    766.80x = 777,078.83
  5. Step 5: Solve for x
    x = 777,078.83/766.80
  6. Step 6: Final answer
    x = 1,013.40

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1.5x scale

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.