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Finding the Fourth Proportional to 412.60, 618.64 and 196.24

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Solution

The fourth proportional to 412.60, 618.64 and 196.24 is: 294.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    412.60 : 618.64 = 196.24 : x
  2. Step 2: Convert to fraction form
    412.60/618.64 = 196.24/x
  3. Step 3: Cross multiply
    412.60x = 618.64 × 196.24
  4. Step 4: Simplify right side
    412.60x = 121,401.91
  5. Step 5: Solve for x
    x = 121,401.91/412.60
  6. Step 6: Final answer
    x = 294.24

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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.