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Finding the Fourth Proportional to 2,588.78, 3,883.26 and 640.98

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Solution

The fourth proportional to 2,588.78, 3,883.26 and 640.98 is: 961.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,588.78 : 3,883.26 = 640.98 : x
  2. Step 2: Convert to fraction form
    2,588.78/3,883.26 = 640.98/x
  3. Step 3: Cross multiply
    2,588.78x = 3,883.26 × 640.98
  4. Step 4: Simplify right side
    2,588.78x = 2,489,091.99
  5. Step 5: Solve for x
    x = 2,489,091.99/2,588.78
  6. Step 6: Final answer
    x = 961.49

Related Problems

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Half scale
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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.