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Finding the Fourth Proportional to 412.18, 618.25 and 104.03

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Solution

The fourth proportional to 412.18, 618.25 and 104.03 is: 156.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    412.18 : 618.25 = 104.03 : x
  2. Step 2: Convert to fraction form
    412.18/618.25 = 104.03/x
  3. Step 3: Cross multiply
    412.18x = 618.25 × 104.03
  4. Step 4: Simplify right side
    412.18x = 64,316.55
  5. Step 5: Solve for x
    x = 64,316.55/412.18
  6. Step 6: Final answer
    x = 156.04

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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.