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Finding the Fourth Proportional to 793.61, 1,190.11 and 549.39

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Solution

The fourth proportional to 793.61, 1,190.11 and 549.39 is: 823.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    793.61 : 1,190.11 = 549.39 : x
  2. Step 2: Convert to fraction form
    793.61/1,190.11 = 549.39/x
  3. Step 3: Cross multiply
    793.61x = 1,190.11 × 549.39
  4. Step 4: Simplify right side
    793.61x = 653,834.53
  5. Step 5: Solve for x
    x = 653,834.53/793.61
  6. Step 6: Final answer
    x = 823.87

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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.