Home / 398,629.20-597,943.80-257,624.40

Finding the Fourth Proportional to 398,629.20, 597,943.80 and 257,624.40

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Solution

The fourth proportional to 398,629.20, 597,943.80 and 257,624.40 is: 386,436.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,629.20 : 597,943.80 = 257,624.40 : x
  2. Step 2: Convert to fraction form
    398,629.20/597,943.80 = 257,624.40/x
  3. Step 3: Cross multiply
    398,629.20x = 597,943.80 × 257,624.40
  4. Step 4: Simplify right side
    398,629.20x = 154,044,912,708.72
  5. Step 5: Solve for x
    x = 154,044,912,708.72/398,629.20
  6. Step 6: Final answer
    x = 386,436.60

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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.