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Finding the Fourth Proportional to 297.96, 411 and 261.12

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Solution

The fourth proportional to 297.96, 411 and 261.12 is: 360.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    297.96 : 411 = 261.12 : x
  2. Step 2: Convert to fraction form
    297.96/411 = 261.12/x
  3. Step 3: Cross multiply
    297.96x = 411 × 261.12
  4. Step 4: Simplify right side
    297.96x = 107,320.32
  5. Step 5: Solve for x
    x = 107,320.32/297.96
  6. Step 6: Final answer
    x = 360.18

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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.