Home / 2,113.42-2,915.81-1,228.49

Finding the Fourth Proportional to 2,113.42, 2,915.81 and 1,228.49

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Solution

The fourth proportional to 2,113.42, 2,915.81 and 1,228.49 is: 1,694.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,113.42 : 2,915.81 = 1,228.49 : x
  2. Step 2: Convert to fraction form
    2,113.42/2,915.81 = 1,228.49/x
  3. Step 3: Cross multiply
    2,113.42x = 2,915.81 × 1,228.49
  4. Step 4: Simplify right side
    2,113.42x = 3,582,044.57
  5. Step 5: Solve for x
    x = 3,582,044.57/2,113.42
  6. Step 6: Final answer
    x = 1,694.91

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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.