Home / 1,380.35-2,065.91-1,133.55

Finding the Fourth Proportional to 1,380.35, 2,065.91 and 1,133.55

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Solution

The fourth proportional to 1,380.35, 2,065.91 and 1,133.55 is: 1,696.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,380.35 : 2,065.91 = 1,133.55 : x
  2. Step 2: Convert to fraction form
    1,380.35/2,065.91 = 1,133.55/x
  3. Step 3: Cross multiply
    1,380.35x = 2,065.91 × 1,133.55
  4. Step 4: Simplify right side
    1,380.35x = 2,341,806.61
  5. Step 5: Solve for x
    x = 2,341,806.61/1,380.35
  6. Step 6: Final answer
    x = 1,696.54

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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.