Home / 2,231.35-3,078.91-1,287.17

Finding the Fourth Proportional to 2,231.35, 3,078.91 and 1,287.17

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Solution

The fourth proportional to 2,231.35, 3,078.91 and 1,287.17 is: 1,776.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,231.35 : 3,078.91 = 1,287.17 : x
  2. Step 2: Convert to fraction form
    2,231.35/3,078.91 = 1,287.17/x
  3. Step 3: Cross multiply
    2,231.35x = 3,078.91 × 1,287.17
  4. Step 4: Simplify right side
    2,231.35x = 3,963,095.66
  5. Step 5: Solve for x
    x = 3,963,095.66/2,231.35
  6. Step 6: Final answer
    x = 1,776.10

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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.