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Finding the Fourth Proportional to 402.21, 602.91 and 353.61

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Solution

The fourth proportional to 402.21, 602.91 and 353.61 is: 530.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.21 : 602.91 = 353.61 : x
  2. Step 2: Convert to fraction form
    402.21/602.91 = 353.61/x
  3. Step 3: Cross multiply
    402.21x = 602.91 × 353.61
  4. Step 4: Simplify right side
    402.21x = 213,195.01
  5. Step 5: Solve for x
    x = 213,195.01/402.21
  6. Step 6: Final answer
    x = 530.06

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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.