Home / 1,331.82-1,987.56-1,186.02

Finding the Fourth Proportional to 1,331.82, 1,987.56 and 1,186.02

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Solution

The fourth proportional to 1,331.82, 1,987.56 and 1,186.02 is: 1,769.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,331.82 : 1,987.56 = 1,186.02 : x
  2. Step 2: Convert to fraction form
    1,331.82/1,987.56 = 1,186.02/x
  3. Step 3: Cross multiply
    1,331.82x = 1,987.56 × 1,186.02
  4. Step 4: Simplify right side
    1,331.82x = 2,357,285.91
  5. Step 5: Solve for x
    x = 2,357,285.91/1,331.82
  6. Step 6: Final answer
    x = 1,769.97

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.