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Finding the Fourth Proportional to 412,793.10, 619,189.65 and 286,821.90

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Solution

The fourth proportional to 412,793.10, 619,189.65 and 286,821.90 is: 430,232.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,793.10 : 619,189.65 = 286,821.90 : x
  2. Step 2: Convert to fraction form
    412,793.10/619,189.65 = 286,821.90/x
  3. Step 3: Cross multiply
    412,793.10x = 619,189.65 × 286,821.90
  4. Step 4: Simplify right side
    412,793.10x = 177,597,151,873.34
  5. Step 5: Solve for x
    x = 177,597,151,873.34/412,793.10
  6. Step 6: Final answer
    x = 430,232.85

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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.