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Finding the Fourth Proportional to 775.49, 1,163.63 and 515.66

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Solution

The fourth proportional to 775.49, 1,163.63 and 515.66 is: 773.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    775.49 : 1,163.63 = 515.66 : x
  2. Step 2: Convert to fraction form
    775.49/1,163.63 = 515.66/x
  3. Step 3: Cross multiply
    775.49x = 1,163.63 × 515.66
  4. Step 4: Simplify right side
    775.49x = 600,029.05
  5. Step 5: Solve for x
    x = 600,029.05/775.49
  6. Step 6: Final answer
    x = 773.75

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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.