Home / 1,989.96-2,746-1,105.71

Finding the Fourth Proportional to 1,989.96, 2,746 and 1,105.71

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Solution

The fourth proportional to 1,989.96, 2,746 and 1,105.71 is: 1,525.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989.96 : 2,746 = 1,105.71 : x
  2. Step 2: Convert to fraction form
    1,989.96/2,746 = 1,105.71/x
  3. Step 3: Cross multiply
    1,989.96x = 2,746 × 1,105.71
  4. Step 4: Simplify right side
    1,989.96x = 3,036,279.66
  5. Step 5: Solve for x
    x = 3,036,279.66/1,989.96
  6. Step 6: Final answer
    x = 1,525.80

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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.