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Finding the Fourth Proportional to 563.94, 845.46 and 426.78

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Solution

The fourth proportional to 563.94, 845.46 and 426.78 is: 639.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    563.94 : 845.46 = 426.78 : x
  2. Step 2: Convert to fraction form
    563.94/845.46 = 426.78/x
  3. Step 3: Cross multiply
    563.94x = 845.46 × 426.78
  4. Step 4: Simplify right side
    563.94x = 360,825.42
  5. Step 5: Solve for x
    x = 360,825.42/563.94
  6. Step 6: Final answer
    x = 639.83

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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.