Home / 2,615.30-3,922.87-640.92

Finding the Fourth Proportional to 2,615.30, 3,922.87 and 640.92

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Solution

The fourth proportional to 2,615.30, 3,922.87 and 640.92 is: 961.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,615.30 : 3,922.87 = 640.92 : x
  2. Step 2: Convert to fraction form
    2,615.30/3,922.87 = 640.92/x
  3. Step 3: Cross multiply
    2,615.30x = 3,922.87 × 640.92
  4. Step 4: Simplify right side
    2,615.30x = 2,514,245.84
  5. Step 5: Solve for x
    x = 2,514,245.84/2,615.30
  6. Step 6: Final answer
    x = 961.36

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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.