Home / 1,972.05-2,721.35-1,087.85

Finding the Fourth Proportional to 1,972.05, 2,721.35 and 1,087.85

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Solution

The fourth proportional to 1,972.05, 2,721.35 and 1,087.85 is: 1,501.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,972.05 : 2,721.35 = 1,087.85 : x
  2. Step 2: Convert to fraction form
    1,972.05/2,721.35 = 1,087.85/x
  3. Step 3: Cross multiply
    1,972.05x = 2,721.35 × 1,087.85
  4. Step 4: Simplify right side
    1,972.05x = 2,960,430.80
  5. Step 5: Solve for x
    x = 2,960,430.80/1,972.05
  6. Step 6: Final answer
    x = 1,501.19

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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.