Home / 1,972.10-2,721.49-1,087.90

Finding the Fourth Proportional to 1,972.10, 2,721.49 and 1,087.90

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Solution

The fourth proportional to 1,972.10, 2,721.49 and 1,087.90 is: 1,501.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,972.10 : 2,721.49 = 1,087.90 : x
  2. Step 2: Convert to fraction form
    1,972.10/2,721.49 = 1,087.90/x
  3. Step 3: Cross multiply
    1,972.10x = 2,721.49 × 1,087.90
  4. Step 4: Simplify right side
    1,972.10x = 2,960,697.41
  5. Step 5: Solve for x
    x = 2,960,697.41/1,972.10
  6. Step 6: Final answer
    x = 1,501.29

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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.