Home / 1,971.34-2,720.39-1,087.09

Finding the Fourth Proportional to 1,971.34, 2,720.39 and 1,087.09

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Solution

The fourth proportional to 1,971.34, 2,720.39 and 1,087.09 is: 1,500.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,971.34 : 2,720.39 = 1,087.09 : x
  2. Step 2: Convert to fraction form
    1,971.34/2,720.39 = 1,087.09/x
  3. Step 3: Cross multiply
    1,971.34x = 2,720.39 × 1,087.09
  4. Step 4: Simplify right side
    1,971.34x = 2,957,296.53
  5. Step 5: Solve for x
    x = 2,957,296.53/1,971.34
  6. Step 6: Final answer
    x = 1,500.15

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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.