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Finding the Fourth Proportional to 215.15, 322.12 and 200.57

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Solution

The fourth proportional to 215.15, 322.12 and 200.57 is: 300.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.15 : 322.12 = 200.57 : x
  2. Step 2: Convert to fraction form
    215.15/322.12 = 200.57/x
  3. Step 3: Cross multiply
    215.15x = 322.12 × 200.57
  4. Step 4: Simplify right side
    215.15x = 64,606.61
  5. Step 5: Solve for x
    x = 64,606.61/215.15
  6. Step 6: Final answer
    x = 300.29

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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.