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Finding the Fourth Proportional to 2,588.76, 3,883.10 and 640.96

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Solution

The fourth proportional to 2,588.76, 3,883.10 and 640.96 is: 961.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,588.76 : 3,883.10 = 640.96 : x
  2. Step 2: Convert to fraction form
    2,588.76/3,883.10 = 640.96/x
  3. Step 3: Cross multiply
    2,588.76x = 3,883.10 × 640.96
  4. Step 4: Simplify right side
    2,588.76x = 2,488,911.78
  5. Step 5: Solve for x
    x = 2,488,911.78/2,588.76
  6. Step 6: Final answer
    x = 961.43

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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.