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Finding the Fourth Proportional to 428,379, 591,186.60 and 237,388.20

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Solution

The fourth proportional to 428,379, 591,186.60 and 237,388.20 is: 327,608.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,379 : 591,186.60 = 237,388.20 : x
  2. Step 2: Convert to fraction form
    428,379/591,186.60 = 237,388.20/x
  3. Step 3: Cross multiply
    428,379x = 591,186.60 × 237,388.20
  4. Step 4: Simplify right side
    428,379x = 140,340,722,838.12
  5. Step 5: Solve for x
    x = 140,340,722,838.12/428,379
  6. Step 6: Final answer
    x = 327,608.78

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1.5x scale

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.