Home / 1,440.12-1,987.25-850.55

Finding the Fourth Proportional to 1,440.12, 1,987.25 and 850.55

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Solution

The fourth proportional to 1,440.12, 1,987.25 and 850.55 is: 1,173.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,440.12 : 1,987.25 = 850.55 : x
  2. Step 2: Convert to fraction form
    1,440.12/1,987.25 = 850.55/x
  3. Step 3: Cross multiply
    1,440.12x = 1,987.25 × 850.55
  4. Step 4: Simplify right side
    1,440.12x = 1,690,247.68
  5. Step 5: Solve for x
    x = 1,690,247.68/1,440.12
  6. Step 6: Final answer
    x = 1,173.69

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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.