Home / 3,115.20-4,298.88-2,069.16

Finding the Fourth Proportional to 3,115.20, 4,298.88 and 2,069.16

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Solution

The fourth proportional to 3,115.20, 4,298.88 and 2,069.16 is: 2,855.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,115.20 : 4,298.88 = 2,069.16 : x
  2. Step 2: Convert to fraction form
    3,115.20/4,298.88 = 2,069.16/x
  3. Step 3: Cross multiply
    3,115.20x = 4,298.88 × 2,069.16
  4. Step 4: Simplify right side
    3,115.20x = 8,895,070.54
  5. Step 5: Solve for x
    x = 8,895,070.54/3,115.20
  6. Step 6: Final answer
    x = 2,855.38

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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.