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Finding the Fourth Proportional to 2,616.54, 3,923.94 and 767.76

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Solution

The fourth proportional to 2,616.54, 3,923.94 and 767.76 is: 1,151.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,616.54 : 3,923.94 = 767.76 : x
  2. Step 2: Convert to fraction form
    2,616.54/3,923.94 = 767.76/x
  3. Step 3: Cross multiply
    2,616.54x = 3,923.94 × 767.76
  4. Step 4: Simplify right side
    2,616.54x = 3,012,644.17
  5. Step 5: Solve for x
    x = 3,012,644.17/2,616.54
  6. Step 6: Final answer
    x = 1,151.38

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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.