Home / 398,440.20-597,986.70-395,329.80

Finding the Fourth Proportional to 398,440.20, 597,986.70 and 395,329.80

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Solution

The fourth proportional to 398,440.20, 597,986.70 and 395,329.80 is: 593,318.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,440.20 : 597,986.70 = 395,329.80 : x
  2. Step 2: Convert to fraction form
    398,440.20/597,986.70 = 395,329.80/x
  3. Step 3: Cross multiply
    398,440.20x = 597,986.70 × 395,329.80
  4. Step 4: Simplify right side
    398,440.20x = 236,401,962,513.66
  5. Step 5: Solve for x
    x = 236,401,962,513.66/398,440.20
  6. Step 6: Final answer
    x = 593,318.55

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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.