Home / 1,785.24-2,678.77-811.22

Finding the Fourth Proportional to 1,785.24, 2,678.77 and 811.22

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Solution

The fourth proportional to 1,785.24, 2,678.77 and 811.22 is: 1,217.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,785.24 : 2,678.77 = 811.22 : x
  2. Step 2: Convert to fraction form
    1,785.24/2,678.77 = 811.22/x
  3. Step 3: Cross multiply
    1,785.24x = 2,678.77 × 811.22
  4. Step 4: Simplify right side
    1,785.24x = 2,173,059.42
  5. Step 5: Solve for x
    x = 2,173,059.42/1,785.24
  6. Step 6: Final answer
    x = 1,217.24

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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.