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Finding the Fourth Proportional to 887.08, 1,221.69 and 867.95

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Solution

The fourth proportional to 887.08, 1,221.69 and 867.95 is: 1,195.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.08 : 1,221.69 = 867.95 : x
  2. Step 2: Convert to fraction form
    887.08/1,221.69 = 867.95/x
  3. Step 3: Cross multiply
    887.08x = 1,221.69 × 867.95
  4. Step 4: Simplify right side
    887.08x = 1,060,365.84
  5. Step 5: Solve for x
    x = 1,060,365.84/887.08
  6. Step 6: Final answer
    x = 1,195.34

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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.