Home / 3,120.77-4,296.84-2,647.69

Finding the Fourth Proportional to 3,120.77, 4,296.84 and 2,647.69

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Solution

The fourth proportional to 3,120.77, 4,296.84 and 2,647.69 is: 3,645.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.77 : 4,296.84 = 2,647.69 : x
  2. Step 2: Convert to fraction form
    3,120.77/4,296.84 = 2,647.69/x
  3. Step 3: Cross multiply
    3,120.77x = 4,296.84 × 2,647.69
  4. Step 4: Simplify right side
    3,120.77x = 11,376,700.30
  5. Step 5: Solve for x
    x = 11,376,700.30/3,120.77
  6. Step 6: Final answer
    x = 3,645.48

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.