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Finding the Fourth Proportional to 812.01, 1,120.59 and 635.19

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Solution

The fourth proportional to 812.01, 1,120.59 and 635.19 is: 876.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    812.01 : 1,120.59 = 635.19 : x
  2. Step 2: Convert to fraction form
    812.01/1,120.59 = 635.19/x
  3. Step 3: Cross multiply
    812.01x = 1,120.59 × 635.19
  4. Step 4: Simplify right side
    812.01x = 711,787.56
  5. Step 5: Solve for x
    x = 711,787.56/812.01
  6. Step 6: Final answer
    x = 876.57

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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.