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Finding the Fourth Proportional to 408,090, 612,170.28 and 112,602

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Solution

The fourth proportional to 408,090, 612,170.28 and 112,602 is: 168,912.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,090 : 612,170.28 = 112,602 : x
  2. Step 2: Convert to fraction form
    408,090/612,170.28 = 112,602/x
  3. Step 3: Cross multiply
    408,090x = 612,170.28 × 112,602
  4. Step 4: Simplify right side
    408,090x = 68,931,597,868.56
  5. Step 5: Solve for x
    x = 68,931,597,868.56/408,090
  6. Step 6: Final answer
    x = 168,912.73

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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.