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Finding the Fourth Proportional to 1,018.08, 1,401.30 and 850.44

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Solution

The fourth proportional to 1,018.08, 1,401.30 and 850.44 is: 1,170.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,018.08 : 1,401.30 = 850.44 : x
  2. Step 2: Convert to fraction form
    1,018.08/1,401.30 = 850.44/x
  3. Step 3: Cross multiply
    1,018.08x = 1,401.30 × 850.44
  4. Step 4: Simplify right side
    1,018.08x = 1,191,721.57
  5. Step 5: Solve for x
    x = 1,191,721.57/1,018.08
  6. Step 6: Final answer
    x = 1,170.56

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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.