Home / 1,511.26-2,084.60-987.28

Finding the Fourth Proportional to 1,511.26, 2,084.60 and 987.28

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Solution

The fourth proportional to 1,511.26, 2,084.60 and 987.28 is: 1,361.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,511.26 : 2,084.60 = 987.28 : x
  2. Step 2: Convert to fraction form
    1,511.26/2,084.60 = 987.28/x
  3. Step 3: Cross multiply
    1,511.26x = 2,084.60 × 987.28
  4. Step 4: Simplify right side
    1,511.26x = 2,058,083.89
  5. Step 5: Solve for x
    x = 2,058,083.89/1,511.26
  6. Step 6: Final answer
    x = 1,361.83

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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.