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Finding the Fourth Proportional to 408,186.10, 612,267.88 and 108,669.28

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Solution

The fourth proportional to 408,186.10, 612,267.88 and 108,669.28 is: 163,000.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,186.10 : 612,267.88 = 108,669.28 : x
  2. Step 2: Convert to fraction form
    408,186.10/612,267.88 = 108,669.28/x
  3. Step 3: Cross multiply
    408,186.10x = 612,267.88 × 108,669.28
  4. Step 4: Simplify right side
    408,186.10x = 66,534,709,236.14
  5. Step 5: Solve for x
    x = 66,534,709,236.14/408,186.10
  6. Step 6: Final answer
    x = 163,000.92

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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.