Home / 1,851.91-2,555.99-1,189.60

Finding the Fourth Proportional to 1,851.91, 2,555.99 and 1,189.60

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Solution

The fourth proportional to 1,851.91, 2,555.99 and 1,189.60 is: 1,641.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,851.91 : 2,555.99 = 1,189.60 : x
  2. Step 2: Convert to fraction form
    1,851.91/2,555.99 = 1,189.60/x
  3. Step 3: Cross multiply
    1,851.91x = 2,555.99 × 1,189.60
  4. Step 4: Simplify right side
    1,851.91x = 3,040,602.29
  5. Step 5: Solve for x
    x = 3,040,602.29/1,851.91
  6. Step 6: Final answer
    x = 1,641.88

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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.