Home / 3,785.83-5,678.57-1,321.20

Finding the Fourth Proportional to 3,785.83, 5,678.57 and 1,321.20

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Solution

The fourth proportional to 3,785.83, 5,678.57 and 1,321.20 is: 1,981.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,785.83 : 5,678.57 = 1,321.20 : x
  2. Step 2: Convert to fraction form
    3,785.83/5,678.57 = 1,321.20/x
  3. Step 3: Cross multiply
    3,785.83x = 5,678.57 × 1,321.20
  4. Step 4: Simplify right side
    3,785.83x = 7,502,526.68
  5. Step 5: Solve for x
    x = 7,502,526.68/3,785.83
  6. Step 6: Final answer
    x = 1,981.74

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Similar ratio
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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.