Home / 519,317.20-778,975.80-508,819.60

Finding the Fourth Proportional to 519,317.20, 778,975.80 and 508,819.60

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Solution

The fourth proportional to 519,317.20, 778,975.80 and 508,819.60 is: 763,229.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,317.20 : 778,975.80 = 508,819.60 : x
  2. Step 2: Convert to fraction form
    519,317.20/778,975.80 = 508,819.60/x
  3. Step 3: Cross multiply
    519,317.20x = 778,975.80 × 508,819.60
  4. Step 4: Simplify right side
    519,317.20x = 396,358,154,965.68
  5. Step 5: Solve for x
    x = 396,358,154,965.68/519,317.20
  6. Step 6: Final answer
    x = 763,229.40

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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.