Home / 2,206.76-3,045.68-1,275.80

Finding the Fourth Proportional to 2,206.76, 3,045.68 and 1,275.80

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Solution

The fourth proportional to 2,206.76, 3,045.68 and 1,275.80 is: 1,760.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,206.76 : 3,045.68 = 1,275.80 : x
  2. Step 2: Convert to fraction form
    2,206.76/3,045.68 = 1,275.80/x
  3. Step 3: Cross multiply
    2,206.76x = 3,045.68 × 1,275.80
  4. Step 4: Simplify right side
    2,206.76x = 3,885,678.54
  5. Step 5: Solve for x
    x = 3,885,678.54/2,206.76
  6. Step 6: Final answer
    x = 1,760.81

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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.