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Finding the Fourth Proportional to 311.04, 465.95 and 208.07

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Solution

The fourth proportional to 311.04, 465.95 and 208.07 is: 311.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    311.04 : 465.95 = 208.07 : x
  2. Step 2: Convert to fraction form
    311.04/465.95 = 208.07/x
  3. Step 3: Cross multiply
    311.04x = 465.95 × 208.07
  4. Step 4: Simplify right side
    311.04x = 96,950.15
  5. Step 5: Solve for x
    x = 96,950.15/311.04
  6. Step 6: Final answer
    x = 311.70

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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.