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Finding the Fourth Proportional to 519,620.80, 779,431.20 and 379,652.80

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Solution

The fourth proportional to 519,620.80, 779,431.20 and 379,652.80 is: 569,479.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,620.80 : 779,431.20 = 379,652.80 : x
  2. Step 2: Convert to fraction form
    519,620.80/779,431.20 = 379,652.80/x
  3. Step 3: Cross multiply
    519,620.80x = 779,431.20 × 379,652.80
  4. Step 4: Simplify right side
    519,620.80x = 295,913,237,487.36
  5. Step 5: Solve for x
    x = 295,913,237,487.36/519,620.80
  6. Step 6: Final answer
    x = 569,479.20

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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.