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Finding the Fourth Proportional to 554,139.40, 831,209.10 and 199,189.30

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Solution

The fourth proportional to 554,139.40, 831,209.10 and 199,189.30 is: 298,783.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,139.40 : 831,209.10 = 199,189.30 : x
  2. Step 2: Convert to fraction form
    554,139.40/831,209.10 = 199,189.30/x
  3. Step 3: Cross multiply
    554,139.40x = 831,209.10 × 199,189.30
  4. Step 4: Simplify right side
    554,139.40x = 165,567,958,782.63
  5. Step 5: Solve for x
    x = 165,567,958,782.63/554,139.40
  6. Step 6: Final answer
    x = 298,783.95

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Double scale
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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.