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Finding the Fourth Proportional to 398,933.80, 598,400.70 and 347,612.20

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Solution

The fourth proportional to 398,933.80, 598,400.70 and 347,612.20 is: 521,418.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,933.80 : 598,400.70 = 347,612.20 : x
  2. Step 2: Convert to fraction form
    398,933.80/598,400.70 = 347,612.20/x
  3. Step 3: Cross multiply
    398,933.80x = 598,400.70 × 347,612.20
  4. Step 4: Simplify right side
    398,933.80x = 208,011,383,808.54
  5. Step 5: Solve for x
    x = 208,011,383,808.54/398,933.80
  6. Step 6: Final answer
    x = 521,418.30

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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.