Home / 1,992.19-2,987.89-1,893.40

Finding the Fourth Proportional to 1,992.19, 2,987.89 and 1,893.40

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Solution

The fourth proportional to 1,992.19, 2,987.89 and 1,893.40 is: 2,839.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,992.19 : 2,987.89 = 1,893.40 : x
  2. Step 2: Convert to fraction form
    1,992.19/2,987.89 = 1,893.40/x
  3. Step 3: Cross multiply
    1,992.19x = 2,987.89 × 1,893.40
  4. Step 4: Simplify right side
    1,992.19x = 5,657,270.93
  5. Step 5: Solve for x
    x = 5,657,270.93/1,992.19
  6. Step 6: Final answer
    x = 2,839.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.