Home / 1,389.06-2,085.75-1,067.22

Finding the Fourth Proportional to 1,389.06, 2,085.75 and 1,067.22

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Solution

The fourth proportional to 1,389.06, 2,085.75 and 1,067.22 is: 1,602.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389.06 : 2,085.75 = 1,067.22 : x
  2. Step 2: Convert to fraction form
    1,389.06/2,085.75 = 1,067.22/x
  3. Step 3: Cross multiply
    1,389.06x = 2,085.75 × 1,067.22
  4. Step 4: Simplify right side
    1,389.06x = 2,225,954.12
  5. Step 5: Solve for x
    x = 2,225,954.12/1,389.06
  6. Step 6: Final answer
    x = 1,602.49

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1.5x scale

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.