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Finding the Fourth Proportional to 562.21, 841.25 and 331.20

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Solution

The fourth proportional to 562.21, 841.25 and 331.20 is: 495.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    562.21 : 841.25 = 331.20 : x
  2. Step 2: Convert to fraction form
    562.21/841.25 = 331.20/x
  3. Step 3: Cross multiply
    562.21x = 841.25 × 331.20
  4. Step 4: Simplify right side
    562.21x = 278,622
  5. Step 5: Solve for x
    x = 278,622/562.21
  6. Step 6: Final answer
    x = 495.58

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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.