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Finding the Fourth Proportional to 407,747.40, 611,621.10 and 127,228.20

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Solution

The fourth proportional to 407,747.40, 611,621.10 and 127,228.20 is: 190,842.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,747.40 : 611,621.10 = 127,228.20 : x
  2. Step 2: Convert to fraction form
    407,747.40/611,621.10 = 127,228.20/x
  3. Step 3: Cross multiply
    407,747.40x = 611,621.10 × 127,228.20
  4. Step 4: Simplify right side
    407,747.40x = 77,815,451,635.02
  5. Step 5: Solve for x
    x = 77,815,451,635.02/407,747.40
  6. Step 6: Final answer
    x = 190,842.30

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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.