Home / 1,329.05-1,989.71-1,188.33

Finding the Fourth Proportional to 1,329.05, 1,989.71 and 1,188.33

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Solution

The fourth proportional to 1,329.05, 1,989.71 and 1,188.33 is: 1,779.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,329.05 : 1,989.71 = 1,188.33 : x
  2. Step 2: Convert to fraction form
    1,329.05/1,989.71 = 1,188.33/x
  3. Step 3: Cross multiply
    1,329.05x = 1,989.71 × 1,188.33
  4. Step 4: Simplify right side
    1,329.05x = 2,364,426.14
  5. Step 5: Solve for x
    x = 2,364,426.14/1,329.05
  6. Step 6: Final answer
    x = 1,779.04

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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.