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Finding the Fourth Proportional to 816.41, 1,223.43 and 610.83

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Solution

The fourth proportional to 816.41, 1,223.43 and 610.83 is: 915.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    816.41 : 1,223.43 = 610.83 : x
  2. Step 2: Convert to fraction form
    816.41/1,223.43 = 610.83/x
  3. Step 3: Cross multiply
    816.41x = 1,223.43 × 610.83
  4. Step 4: Simplify right side
    816.41x = 747,307.75
  5. Step 5: Solve for x
    x = 747,307.75/816.41
  6. Step 6: Final answer
    x = 915.36

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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.