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Finding the Fourth Proportional to 207.51, 311.11 and 99.37

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Solution

The fourth proportional to 207.51, 311.11 and 99.37 is: 148.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.51 : 311.11 = 99.37 : x
  2. Step 2: Convert to fraction form
    207.51/311.11 = 99.37/x
  3. Step 3: Cross multiply
    207.51x = 311.11 × 99.37
  4. Step 4: Simplify right side
    207.51x = 30,914.50
  5. Step 5: Solve for x
    x = 30,914.50/207.51
  6. Step 6: Final answer
    x = 148.98

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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.