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Finding the Fourth Proportional to 564.45, 847.31 and 426.34

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Solution

The fourth proportional to 564.45, 847.31 and 426.34 is: 639.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    564.45 : 847.31 = 426.34 : x
  2. Step 2: Convert to fraction form
    564.45/847.31 = 426.34/x
  3. Step 3: Cross multiply
    564.45x = 847.31 × 426.34
  4. Step 4: Simplify right side
    564.45x = 361,242.15
  5. Step 5: Solve for x
    x = 361,242.15/564.45
  6. Step 6: Final answer
    x = 639.99

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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.