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Finding the Fourth Proportional to 398,744.70, 598,443.45 and 395,634.30

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Solution

The fourth proportional to 398,744.70, 598,443.45 and 395,634.30 is: 593,775.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,744.70 : 598,443.45 = 395,634.30 : x
  2. Step 2: Convert to fraction form
    398,744.70/598,443.45 = 395,634.30/x
  3. Step 3: Cross multiply
    398,744.70x = 598,443.45 × 395,634.30
  4. Step 4: Simplify right side
    398,744.70x = 236,764,755,430.34
  5. Step 5: Solve for x
    x = 236,764,755,430.34/398,744.70
  6. Step 6: Final answer
    x = 593,775.30

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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.