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Finding the Fourth Proportional to 3,281.61, 4,922.33 and 816.41

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Solution

The fourth proportional to 3,281.61, 4,922.33 and 816.41 is: 1,224.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,281.61 : 4,922.33 = 816.41 : x
  2. Step 2: Convert to fraction form
    3,281.61/4,922.33 = 816.41/x
  3. Step 3: Cross multiply
    3,281.61x = 4,922.33 × 816.41
  4. Step 4: Simplify right side
    3,281.61x = 4,018,610.74
  5. Step 5: Solve for x
    x = 4,018,610.74/3,281.61
  6. Step 6: Final answer
    x = 1,224.59

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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.