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Finding the Fourth Proportional to 548.61, 821.95 and 479.96

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Solution

The fourth proportional to 548.61, 821.95 and 479.96 is: 719.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.61 : 821.95 = 479.96 : x
  2. Step 2: Convert to fraction form
    548.61/821.95 = 479.96/x
  3. Step 3: Cross multiply
    548.61x = 821.95 × 479.96
  4. Step 4: Simplify right side
    548.61x = 394,500.89
  5. Step 5: Solve for x
    x = 394,500.89/548.61
  6. Step 6: Final answer
    x = 719.10

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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.