Home / 2,345.20-3,251.18-2,220.36

Finding the Fourth Proportional to 2,345.20, 3,251.18 and 2,220.36

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Solution

The fourth proportional to 2,345.20, 3,251.18 and 2,220.36 is: 3,078.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,345.20 : 3,251.18 = 2,220.36 : x
  2. Step 2: Convert to fraction form
    2,345.20/3,251.18 = 2,220.36/x
  3. Step 3: Cross multiply
    2,345.20x = 3,251.18 × 2,220.36
  4. Step 4: Simplify right side
    2,345.20x = 7,218,762.67
  5. Step 5: Solve for x
    x = 7,218,762.67/2,345.20
  6. Step 6: Final answer
    x = 3,078.11

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Half scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.