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Finding the Fourth Proportional to 411.14, 616.67 and 191.67

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Solution

The fourth proportional to 411.14, 616.67 and 191.67 is: 287.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    411.14 : 616.67 = 191.67 : x
  2. Step 2: Convert to fraction form
    411.14/616.67 = 191.67/x
  3. Step 3: Cross multiply
    411.14x = 616.67 × 191.67
  4. Step 4: Simplify right side
    411.14x = 118,196.18
  5. Step 5: Solve for x
    x = 118,196.18/411.14
  6. Step 6: Final answer
    x = 287.49

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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.