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Finding the Fourth Proportional to 816.48, 1,223.91 and 735.48

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Solution

The fourth proportional to 816.48, 1,223.91 and 735.48 is: 1,102.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    816.48 : 1,223.91 = 735.48 : x
  2. Step 2: Convert to fraction form
    816.48/1,223.91 = 735.48/x
  3. Step 3: Cross multiply
    816.48x = 1,223.91 × 735.48
  4. Step 4: Simplify right side
    816.48x = 900,161.33
  5. Step 5: Solve for x
    x = 900,161.33/816.48
  6. Step 6: Final answer
    x = 1,102.49

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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.