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Finding the Fourth Proportional to 207.24, 311.22 and 143.16

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Solution

The fourth proportional to 207.24, 311.22 and 143.16 is: 214.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.24 : 311.22 = 143.16 : x
  2. Step 2: Convert to fraction form
    207.24/311.22 = 143.16/x
  3. Step 3: Cross multiply
    207.24x = 311.22 × 143.16
  4. Step 4: Simplify right side
    207.24x = 44,554.26
  5. Step 5: Solve for x
    x = 44,554.26/207.24
  6. Step 6: Final answer
    x = 214.99

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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.