Home / 1,915.91-2,643.81-1,076.56

Finding the Fourth Proportional to 1,915.91, 2,643.81 and 1,076.56

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Solution

The fourth proportional to 1,915.91, 2,643.81 and 1,076.56 is: 1,485.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,915.91 : 2,643.81 = 1,076.56 : x
  2. Step 2: Convert to fraction form
    1,915.91/2,643.81 = 1,076.56/x
  3. Step 3: Cross multiply
    1,915.91x = 2,643.81 × 1,076.56
  4. Step 4: Simplify right side
    1,915.91x = 2,846,220.09
  5. Step 5: Solve for x
    x = 2,846,220.09/1,915.91
  6. Step 6: Final answer
    x = 1,485.57

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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.