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Finding the Fourth Proportional to 884.80, 1,221.54 and 605.44

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Solution

The fourth proportional to 884.80, 1,221.54 and 605.44 is: 835.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    884.80 : 1,221.54 = 605.44 : x
  2. Step 2: Convert to fraction form
    884.80/1,221.54 = 605.44/x
  3. Step 3: Cross multiply
    884.80x = 1,221.54 × 605.44
  4. Step 4: Simplify right side
    884.80x = 739,569.18
  5. Step 5: Solve for x
    x = 739,569.18/884.80
  6. Step 6: Final answer
    x = 835.86

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1.5x scale

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.