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Finding the Fourth Proportional to 884.26, 1,220.07 and 618.37

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Solution

The fourth proportional to 884.26, 1,220.07 and 618.37 is: 853.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    884.26 : 1,220.07 = 618.37 : x
  2. Step 2: Convert to fraction form
    884.26/1,220.07 = 618.37/x
  3. Step 3: Cross multiply
    884.26x = 1,220.07 × 618.37
  4. Step 4: Simplify right side
    884.26x = 754,454.69
  5. Step 5: Solve for x
    x = 754,454.69/884.26
  6. Step 6: Final answer
    x = 853.20

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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.