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Finding the Fourth Proportional to 563.46, 845.18 and 426.77

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Solution

The fourth proportional to 563.46, 845.18 and 426.77 is: 640.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    563.46 : 845.18 = 426.77 : x
  2. Step 2: Convert to fraction form
    563.46/845.18 = 426.77/x
  3. Step 3: Cross multiply
    563.46x = 845.18 × 426.77
  4. Step 4: Simplify right side
    563.46x = 360,691.11
  5. Step 5: Solve for x
    x = 360,691.11/563.46
  6. Step 6: Final answer
    x = 640.14

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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.