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Finding the Fourth Proportional to 428,793.45, 591,656.73 and 247,439.22

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Solution

The fourth proportional to 428,793.45, 591,656.73 and 247,439.22 is: 341,420.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,793.45 : 591,656.73 = 247,439.22 : x
  2. Step 2: Convert to fraction form
    428,793.45/591,656.73 = 247,439.22/x
  3. Step 3: Cross multiply
    428,793.45x = 591,656.73 × 247,439.22
  4. Step 4: Simplify right side
    428,793.45x = 146,399,079,778.95
  5. Step 5: Solve for x
    x = 146,399,079,778.95/428,793.45
  6. Step 6: Final answer
    x = 341,420.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.