Home / 2,121.39-2,927.14-1,189.89

Finding the Fourth Proportional to 2,121.39, 2,927.14 and 1,189.89

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Solution

The fourth proportional to 2,121.39, 2,927.14 and 1,189.89 is: 1,641.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.39 : 2,927.14 = 1,189.89 : x
  2. Step 2: Convert to fraction form
    2,121.39/2,927.14 = 1,189.89/x
  3. Step 3: Cross multiply
    2,121.39x = 2,927.14 × 1,189.89
  4. Step 4: Simplify right side
    2,121.39x = 3,482,971.64
  5. Step 5: Solve for x
    x = 3,482,971.64/2,121.39
  6. Step 6: Final answer
    x = 1,641.83

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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.