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Finding the Fourth Proportional to 395,422.20, 591,966.90 and 372,353.40

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Solution

The fourth proportional to 395,422.20, 591,966.90 and 372,353.40 is: 557,431.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,422.20 : 591,966.90 = 372,353.40 : x
  2. Step 2: Convert to fraction form
    395,422.20/591,966.90 = 372,353.40/x
  3. Step 3: Cross multiply
    395,422.20x = 591,966.90 × 372,353.40
  4. Step 4: Simplify right side
    395,422.20x = 220,420,887,902.46
  5. Step 5: Solve for x
    x = 220,420,887,902.46/395,422.20
  6. Step 6: Final answer
    x = 557,431.75

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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.