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Finding the Fourth Proportional to 297.20, 410.12 and 210.05

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Solution

The fourth proportional to 297.20, 410.12 and 210.05 is: 289.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    297.20 : 410.12 = 210.05 : x
  2. Step 2: Convert to fraction form
    297.20/410.12 = 210.05/x
  3. Step 3: Cross multiply
    297.20x = 410.12 × 210.05
  4. Step 4: Simplify right side
    297.20x = 86,142.61
  5. Step 5: Solve for x
    x = 86,142.61/297.20
  6. Step 6: Final answer
    x = 289.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.