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Finding the Fourth Proportional to 412.47, 618.92 and 195.99

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Solution

The fourth proportional to 412.47, 618.92 and 195.99 is: 294.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    412.47 : 618.92 = 195.99 : x
  2. Step 2: Convert to fraction form
    412.47/618.92 = 195.99/x
  3. Step 3: Cross multiply
    412.47x = 618.92 × 195.99
  4. Step 4: Simplify right side
    412.47x = 121,302.13
  5. Step 5: Solve for x
    x = 121,302.13/412.47
  6. Step 6: Final answer
    x = 294.09

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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.