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Finding the Fourth Proportional to 400,190.40, 600,139.80 and 133,959.60

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Solution

The fourth proportional to 400,190.40, 600,139.80 and 133,959.60 is: 200,890.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,190.40 : 600,139.80 = 133,959.60 : x
  2. Step 2: Convert to fraction form
    400,190.40/600,139.80 = 133,959.60/x
  3. Step 3: Cross multiply
    400,190.40x = 600,139.80 × 133,959.60
  4. Step 4: Simplify right side
    400,190.40x = 80,394,487,552.08
  5. Step 5: Solve for x
    x = 80,394,487,552.08/400,190.40
  6. Step 6: Final answer
    x = 200,890.59

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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.