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Finding the Fourth Proportional to 1,889.72, 2,607.84 and 1,143.68

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Solution

The fourth proportional to 1,889.72, 2,607.84 and 1,143.68 is: 1,578.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,889.72 : 2,607.84 = 1,143.68 : x
  2. Step 2: Convert to fraction form
    1,889.72/2,607.84 = 1,143.68/x
  3. Step 3: Cross multiply
    1,889.72x = 2,607.84 × 1,143.68
  4. Step 4: Simplify right side
    1,889.72x = 2,982,534.45
  5. Step 5: Solve for x
    x = 2,982,534.45/1,889.72
  6. Step 6: Final answer
    x = 1,578.29

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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.