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Finding the Fourth Proportional to 408,002.70, 612,090.45 and 123,669.90

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Solution

The fourth proportional to 408,002.70, 612,090.45 and 123,669.90 is: 185,531.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,002.70 : 612,090.45 = 123,669.90 : x
  2. Step 2: Convert to fraction form
    408,002.70/612,090.45 = 123,669.90/x
  3. Step 3: Cross multiply
    408,002.70x = 612,090.45 × 123,669.90
  4. Step 4: Simplify right side
    408,002.70x = 75,697,164,742.46
  5. Step 5: Solve for x
    x = 75,697,164,742.46/408,002.70
  6. Step 6: Final answer
    x = 185,531.04

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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.