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Finding the Fourth Proportional to 2,110.74, 3,166.55 and 649.82

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Solution

The fourth proportional to 2,110.74, 3,166.55 and 649.82 is: 974.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,110.74 : 3,166.55 = 649.82 : x
  2. Step 2: Convert to fraction form
    2,110.74/3,166.55 = 649.82/x
  3. Step 3: Cross multiply
    2,110.74x = 3,166.55 × 649.82
  4. Step 4: Simplify right side
    2,110.74x = 2,057,687.52
  5. Step 5: Solve for x
    x = 2,057,687.52/2,110.74
  6. Step 6: Final answer
    x = 974.87

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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.