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Finding the Fourth Proportional to 412.61, 618.30 and 181.28

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Solution

The fourth proportional to 412.61, 618.30 and 181.28 is: 271.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    412.61 : 618.30 = 181.28 : x
  2. Step 2: Convert to fraction form
    412.61/618.30 = 181.28/x
  3. Step 3: Cross multiply
    412.61x = 618.30 × 181.28
  4. Step 4: Simplify right side
    412.61x = 112,086.97
  5. Step 5: Solve for x
    x = 112,086.97/412.61
  6. Step 6: Final answer
    x = 271.66

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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.