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Finding the Fourth Proportional to 766.99, 1,149.22 and 441.55

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Solution

The fourth proportional to 766.99, 1,149.22 and 441.55 is: 661.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    766.99 : 1,149.22 = 441.55 : x
  2. Step 2: Convert to fraction form
    766.99/1,149.22 = 441.55/x
  3. Step 3: Cross multiply
    766.99x = 1,149.22 × 441.55
  4. Step 4: Simplify right side
    766.99x = 507,438.09
  5. Step 5: Solve for x
    x = 507,438.09/766.99
  6. Step 6: Final answer
    x = 661.60

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Double scale
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1.5x scale

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.