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Finding the Fourth Proportional to 398,422.20, 595,905.30 and 356,604.60

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Solution

The fourth proportional to 398,422.20, 595,905.30 and 356,604.60 is: 533,360.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,422.20 : 595,905.30 = 356,604.60 : x
  2. Step 2: Convert to fraction form
    398,422.20/595,905.30 = 356,604.60/x
  3. Step 3: Cross multiply
    398,422.20x = 595,905.30 × 356,604.60
  4. Step 4: Simplify right side
    398,422.20x = 212,502,571,144.38
  5. Step 5: Solve for x
    x = 212,502,571,144.38/398,422.20
  6. Step 6: Final answer
    x = 533,360.27

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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.