Home / 2,112.52-2,915.64-1,228.61

Finding the Fourth Proportional to 2,112.52, 2,915.64 and 1,228.61

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Solution

The fourth proportional to 2,112.52, 2,915.64 and 1,228.61 is: 1,695.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,112.52 : 2,915.64 = 1,228.61 : x
  2. Step 2: Convert to fraction form
    2,112.52/2,915.64 = 1,228.61/x
  3. Step 3: Cross multiply
    2,112.52x = 2,915.64 × 1,228.61
  4. Step 4: Simplify right side
    2,112.52x = 3,582,163.74
  5. Step 5: Solve for x
    x = 3,582,163.74/2,112.52
  6. Step 6: Final answer
    x = 1,695.69

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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.