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Finding the Fourth Proportional to 1,805.78, 2,491.61 and 1,098

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Solution

The fourth proportional to 1,805.78, 2,491.61 and 1,098 is: 1,515.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,805.78 : 2,491.61 = 1,098 : x
  2. Step 2: Convert to fraction form
    1,805.78/2,491.61 = 1,098/x
  3. Step 3: Cross multiply
    1,805.78x = 2,491.61 × 1,098
  4. Step 4: Simplify right side
    1,805.78x = 2,735,782.29
  5. Step 5: Solve for x
    x = 2,735,782.29/1,805.78
  6. Step 6: Final answer
    x = 1,515.02

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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.