Home / 398,834.20-598,251.30-257,116.60

Finding the Fourth Proportional to 398,834.20, 598,251.30 and 257,116.60

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Solution

The fourth proportional to 398,834.20, 598,251.30 and 257,116.60 is: 385,674.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,834.20 : 598,251.30 = 257,116.60 : x
  2. Step 2: Convert to fraction form
    398,834.20/598,251.30 = 257,116.60/x
  3. Step 3: Cross multiply
    398,834.20x = 598,251.30 × 257,116.60
  4. Step 4: Simplify right side
    398,834.20x = 153,820,340,201.58
  5. Step 5: Solve for x
    x = 153,820,340,201.58/398,834.20
  6. Step 6: Final answer
    x = 385,674.90

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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.