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Finding the Fourth Proportional to 999.03, 1,377.91 and 887.12

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Solution

The fourth proportional to 999.03, 1,377.91 and 887.12 is: 1,223.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    999.03 : 1,377.91 = 887.12 : x
  2. Step 2: Convert to fraction form
    999.03/1,377.91 = 887.12/x
  3. Step 3: Cross multiply
    999.03x = 1,377.91 × 887.12
  4. Step 4: Simplify right side
    999.03x = 1,222,371.52
  5. Step 5: Solve for x
    x = 1,222,371.52/999.03
  6. Step 6: Final answer
    x = 1,223.56

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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.