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Finding the Fourth Proportional to 796.86, 1,099.35 and 486.54

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Solution

The fourth proportional to 796.86, 1,099.35 and 486.54 is: 671.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    796.86 : 1,099.35 = 486.54 : x
  2. Step 2: Convert to fraction form
    796.86/1,099.35 = 486.54/x
  3. Step 3: Cross multiply
    796.86x = 1,099.35 × 486.54
  4. Step 4: Simplify right side
    796.86x = 534,877.75
  5. Step 5: Solve for x
    x = 534,877.75/796.86
  6. Step 6: Final answer
    x = 671.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.