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Finding the Fourth Proportional to 884.72, 1,220.47 and 622.28

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Solution

The fourth proportional to 884.72, 1,220.47 and 622.28 is: 858.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    884.72 : 1,220.47 = 622.28 : x
  2. Step 2: Convert to fraction form
    884.72/1,220.47 = 622.28/x
  3. Step 3: Cross multiply
    884.72x = 1,220.47 × 622.28
  4. Step 4: Simplify right side
    884.72x = 759,475.57
  5. Step 5: Solve for x
    x = 759,475.57/884.72
  6. Step 6: Final answer
    x = 858.43

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Double scale
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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.