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Finding the Fourth Proportional to 402.11, 602.55 and 298.91

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Solution

The fourth proportional to 402.11, 602.55 and 298.91 is: 447.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.11 : 602.55 = 298.91 : x
  2. Step 2: Convert to fraction form
    402.11/602.55 = 298.91/x
  3. Step 3: Cross multiply
    402.11x = 602.55 × 298.91
  4. Step 4: Simplify right side
    402.11x = 180,108.22
  5. Step 5: Solve for x
    x = 180,108.22/402.11
  6. Step 6: Final answer
    x = 447.91

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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.