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Finding the Fourth Proportional to 656.39, 984.55 and 194.15

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Solution

The fourth proportional to 656.39, 984.55 and 194.15 is: 291.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.39 : 984.55 = 194.15 : x
  2. Step 2: Convert to fraction form
    656.39/984.55 = 194.15/x
  3. Step 3: Cross multiply
    656.39x = 984.55 × 194.15
  4. Step 4: Simplify right side
    656.39x = 191,150.38
  5. Step 5: Solve for x
    x = 191,150.38/656.39
  6. Step 6: Final answer
    x = 291.21

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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.