Home / 1,972.15-2,721.46-1,087.79

Finding the Fourth Proportional to 1,972.15, 2,721.46 and 1,087.79

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Solution

The fourth proportional to 1,972.15, 2,721.46 and 1,087.79 is: 1,501.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,972.15 : 2,721.46 = 1,087.79 : x
  2. Step 2: Convert to fraction form
    1,972.15/2,721.46 = 1,087.79/x
  3. Step 3: Cross multiply
    1,972.15x = 2,721.46 × 1,087.79
  4. Step 4: Simplify right side
    1,972.15x = 2,960,357.93
  5. Step 5: Solve for x
    x = 2,960,357.93/1,972.15
  6. Step 6: Final answer
    x = 1,501.09

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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.