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Finding the Fourth Proportional to 876.80, 1,208.04 and 850.07

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Solution

The fourth proportional to 876.80, 1,208.04 and 850.07 is: 1,171.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    876.80 : 1,208.04 = 850.07 : x
  2. Step 2: Convert to fraction form
    876.80/1,208.04 = 850.07/x
  3. Step 3: Cross multiply
    876.80x = 1,208.04 × 850.07
  4. Step 4: Simplify right side
    876.80x = 1,026,918.56
  5. Step 5: Solve for x
    x = 1,026,918.56/876.80
  6. Step 6: Final answer
    x = 1,171.21

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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.