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Finding the Fourth Proportional to 816.70, 1,224.87 and 523.32

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Solution

The fourth proportional to 816.70, 1,224.87 and 523.32 is: 784.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    816.70 : 1,224.87 = 523.32 : x
  2. Step 2: Convert to fraction form
    816.70/1,224.87 = 523.32/x
  3. Step 3: Cross multiply
    816.70x = 1,224.87 × 523.32
  4. Step 4: Simplify right side
    816.70x = 640,998.97
  5. Step 5: Solve for x
    x = 640,998.97/816.70
  6. Step 6: Final answer
    x = 784.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.