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Finding the Fourth Proportional to 207.35, 311.01 and 70.40

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Solution

The fourth proportional to 207.35, 311.01 and 70.40 is: 105.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.35 : 311.01 = 70.40 : x
  2. Step 2: Convert to fraction form
    207.35/311.01 = 70.40/x
  3. Step 3: Cross multiply
    207.35x = 311.01 × 70.40
  4. Step 4: Simplify right side
    207.35x = 21,893.87
  5. Step 5: Solve for x
    x = 21,893.87/207.35
  6. Step 6: Final answer
    x = 105.59

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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.