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Finding the Fourth Proportional to 297.16, 409.80 and 214.80

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Solution

The fourth proportional to 297.16, 409.80 and 214.80 is: 296.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    297.16 : 409.80 = 214.80 : x
  2. Step 2: Convert to fraction form
    297.16/409.80 = 214.80/x
  3. Step 3: Cross multiply
    297.16x = 409.80 × 214.80
  4. Step 4: Simplify right side
    297.16x = 88,025.04
  5. Step 5: Solve for x
    x = 88,025.04/297.16
  6. Step 6: Final answer
    x = 296.22

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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.