Home / 1,389.51-2,085.66-1,159.92

Finding the Fourth Proportional to 1,389.51, 2,085.66 and 1,159.92

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Solution

The fourth proportional to 1,389.51, 2,085.66 and 1,159.92 is: 1,741.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389.51 : 2,085.66 = 1,159.92 : x
  2. Step 2: Convert to fraction form
    1,389.51/2,085.66 = 1,159.92/x
  3. Step 3: Cross multiply
    1,389.51x = 2,085.66 × 1,159.92
  4. Step 4: Simplify right side
    1,389.51x = 2,419,198.75
  5. Step 5: Solve for x
    x = 2,419,198.75/1,389.51
  6. Step 6: Final answer
    x = 1,741.04

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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.