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Finding the Fourth Proportional to 613,030.20, 919,545.30 and 443,756.40

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Solution

The fourth proportional to 613,030.20, 919,545.30 and 443,756.40 is: 665,634.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,030.20 : 919,545.30 = 443,756.40 : x
  2. Step 2: Convert to fraction form
    613,030.20/919,545.30 = 443,756.40/x
  3. Step 3: Cross multiply
    613,030.20x = 919,545.30 × 443,756.40
  4. Step 4: Simplify right side
    613,030.20x = 408,054,111,964.92
  5. Step 5: Solve for x
    x = 408,054,111,964.92/613,030.20
  6. Step 6: Final answer
    x = 665,634.60

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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.