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Finding the Fourth Proportional to 902.91, 1,245.24 and 622.70

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Solution

The fourth proportional to 902.91, 1,245.24 and 622.70 is: 858.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    902.91 : 1,245.24 = 622.70 : x
  2. Step 2: Convert to fraction form
    902.91/1,245.24 = 622.70/x
  3. Step 3: Cross multiply
    902.91x = 1,245.24 × 622.70
  4. Step 4: Simplify right side
    902.91x = 775,404.72
  5. Step 5: Solve for x
    x = 775,404.72/902.91
  6. Step 6: Final answer
    x = 858.78

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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.