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Finding the Fourth Proportional to 408,041.70, 612,062.55 and 399,293.70

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Solution

The fourth proportional to 408,041.70, 612,062.55 and 399,293.70 is: 598,940.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,041.70 : 612,062.55 = 399,293.70 : x
  2. Step 2: Convert to fraction form
    408,041.70/612,062.55 = 399,293.70/x
  3. Step 3: Cross multiply
    408,041.70x = 612,062.55 × 399,293.70
  4. Step 4: Simplify right side
    408,041.70x = 244,392,720,220.94
  5. Step 5: Solve for x
    x = 244,392,720,220.94/408,041.70
  6. Step 6: Final answer
    x = 598,940.55

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Similar ratio
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1.5x scale

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.