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Finding the Fourth Proportional to 559.62, 838.20 and 548.55

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Solution

The fourth proportional to 559.62, 838.20 and 548.55 is: 821.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    559.62 : 838.20 = 548.55 : x
  2. Step 2: Convert to fraction form
    559.62/838.20 = 548.55/x
  3. Step 3: Cross multiply
    559.62x = 838.20 × 548.55
  4. Step 4: Simplify right side
    559.62x = 459,794.61
  5. Step 5: Solve for x
    x = 459,794.61/559.62
  6. Step 6: Final answer
    x = 821.62

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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.