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Finding the Fourth Proportional to 1,440.27, 1,987.32 and 850.99

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Solution

The fourth proportional to 1,440.27, 1,987.32 and 850.99 is: 1,174.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,440.27 : 1,987.32 = 850.99 : x
  2. Step 2: Convert to fraction form
    1,440.27/1,987.32 = 850.99/x
  3. Step 3: Cross multiply
    1,440.27x = 1,987.32 × 850.99
  4. Step 4: Simplify right side
    1,440.27x = 1,691,189.45
  5. Step 5: Solve for x
    x = 1,691,189.45/1,440.27
  6. Step 6: Final answer
    x = 1,174.22

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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.