Home / 1,889.28-2,607.84-1,143.72

Finding the Fourth Proportional to 1,889.28, 2,607.84 and 1,143.72

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Solution

The fourth proportional to 1,889.28, 2,607.84 and 1,143.72 is: 1,578.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,889.28 : 2,607.84 = 1,143.72 : x
  2. Step 2: Convert to fraction form
    1,889.28/2,607.84 = 1,143.72/x
  3. Step 3: Cross multiply
    1,889.28x = 2,607.84 × 1,143.72
  4. Step 4: Simplify right side
    1,889.28x = 2,982,638.76
  5. Step 5: Solve for x
    x = 2,982,638.76/1,889.28
  6. Step 6: Final answer
    x = 1,578.72

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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.