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Finding the Fourth Proportional to 2,588.60, 3,882.84 and 640.80

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Solution

The fourth proportional to 2,588.60, 3,882.84 and 640.80 is: 961.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,588.60 : 3,882.84 = 640.80 : x
  2. Step 2: Convert to fraction form
    2,588.60/3,882.84 = 640.80/x
  3. Step 3: Cross multiply
    2,588.60x = 3,882.84 × 640.80
  4. Step 4: Simplify right side
    2,588.60x = 2,488,123.87
  5. Step 5: Solve for x
    x = 2,488,123.87/2,588.60
  6. Step 6: Final answer
    x = 961.19

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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.