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Finding the Fourth Proportional to 1,817.75, 2,712.90 and 1,642.79

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Solution

The fourth proportional to 1,817.75, 2,712.90 and 1,642.79 is: 2,451.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,817.75 : 2,712.90 = 1,642.79 : x
  2. Step 2: Convert to fraction form
    1,817.75/2,712.90 = 1,642.79/x
  3. Step 3: Cross multiply
    1,817.75x = 2,712.90 × 1,642.79
  4. Step 4: Simplify right side
    1,817.75x = 4,456,716.78
  5. Step 5: Solve for x
    x = 4,456,716.78/1,817.75
  6. Step 6: Final answer
    x = 2,451.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.