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Finding the Fourth Proportional to 520,309.20, 779,945.40 and 239,336.40

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Solution

The fourth proportional to 520,309.20, 779,945.40 and 239,336.40 is: 358,766.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,309.20 : 779,945.40 = 239,336.40 : x
  2. Step 2: Convert to fraction form
    520,309.20/779,945.40 = 239,336.40/x
  3. Step 3: Cross multiply
    520,309.20x = 779,945.40 × 239,336.40
  4. Step 4: Simplify right side
    520,309.20x = 186,669,324,232.56
  5. Step 5: Solve for x
    x = 186,669,324,232.56/520,309.20
  6. Step 6: Final answer
    x = 358,766.14

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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.