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Finding the Fourth Proportional to 519,681.20, 778,865.70 and 252,867.20

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Solution

The fourth proportional to 519,681.20, 778,865.70 and 252,867.20 is: 378,981.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,681.20 : 778,865.70 = 252,867.20 : x
  2. Step 2: Convert to fraction form
    519,681.20/778,865.70 = 252,867.20/x
  3. Step 3: Cross multiply
    519,681.20x = 778,865.70 × 252,867.20
  4. Step 4: Simplify right side
    519,681.20x = 196,949,588,735.04
  5. Step 5: Solve for x
    x = 196,949,588,735.04/519,681.20
  6. Step 6: Final answer
    x = 378,981.55

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Double scale
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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.