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Finding the Fourth Proportional to 911.43, 1,257.62 and 600.75

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Solution

The fourth proportional to 911.43, 1,257.62 and 600.75 is: 828.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    911.43 : 1,257.62 = 600.75 : x
  2. Step 2: Convert to fraction form
    911.43/1,257.62 = 600.75/x
  3. Step 3: Cross multiply
    911.43x = 1,257.62 × 600.75
  4. Step 4: Simplify right side
    911.43x = 755,512.21
  5. Step 5: Solve for x
    x = 755,512.21/911.43
  6. Step 6: Final answer
    x = 828.93

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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.