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Finding the Fourth Proportional to 656.20, 984.47 and 193.98

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Solution

The fourth proportional to 656.20, 984.47 and 193.98 is: 291.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.20 : 984.47 = 193.98 : x
  2. Step 2: Convert to fraction form
    656.20/984.47 = 193.98/x
  3. Step 3: Cross multiply
    656.20x = 984.47 × 193.98
  4. Step 4: Simplify right side
    656.20x = 190,965.77
  5. Step 5: Solve for x
    x = 190,965.77/656.20
  6. Step 6: Final answer
    x = 291.02

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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.