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Finding the Fourth Proportional to 412.01, 618.06 and 130.56

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Solution

The fourth proportional to 412.01, 618.06 and 130.56 is: 195.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    412.01 : 618.06 = 130.56 : x
  2. Step 2: Convert to fraction form
    412.01/618.06 = 130.56/x
  3. Step 3: Cross multiply
    412.01x = 618.06 × 130.56
  4. Step 4: Simplify right side
    412.01x = 80,693.26
  5. Step 5: Solve for x
    x = 80,693.26/412.01
  6. Step 6: Final answer
    x = 195.85

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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.