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Finding the Fourth Proportional to 398,735.20, 598,429.20 and 395,624.80

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Solution

The fourth proportional to 398,735.20, 598,429.20 and 395,624.80 is: 593,761.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,735.20 : 598,429.20 = 395,624.80 : x
  2. Step 2: Convert to fraction form
    398,735.20/598,429.20 = 395,624.80/x
  3. Step 3: Cross multiply
    398,735.20x = 598,429.20 × 395,624.80
  4. Step 4: Simplify right side
    398,735.20x = 236,753,432,564.16
  5. Step 5: Solve for x
    x = 236,753,432,564.16/398,735.20
  6. Step 6: Final answer
    x = 593,761.05

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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.