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Finding the Fourth Proportional to 654.18, 981.42 and 191.94

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Solution

The fourth proportional to 654.18, 981.42 and 191.94 is: 287.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.18 : 981.42 = 191.94 : x
  2. Step 2: Convert to fraction form
    654.18/981.42 = 191.94/x
  3. Step 3: Cross multiply
    654.18x = 981.42 × 191.94
  4. Step 4: Simplify right side
    654.18x = 188,373.75
  5. Step 5: Solve for x
    x = 188,373.75/654.18
  6. Step 6: Final answer
    x = 287.95

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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.