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Finding the Fourth Proportional to 519,121.20, 779,119.20 and 253,109.10

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Solution

The fourth proportional to 519,121.20, 779,119.20 and 253,109.10 is: 379,876.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,121.20 : 779,119.20 = 253,109.10 : x
  2. Step 2: Convert to fraction form
    519,121.20/779,119.20 = 253,109.10/x
  3. Step 3: Cross multiply
    519,121.20x = 779,119.20 × 253,109.10
  4. Step 4: Simplify right side
    519,121.20x = 197,202,159,504.72
  5. Step 5: Solve for x
    x = 197,202,159,504.72/519,121.20
  6. Step 6: Final answer
    x = 379,876.91

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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.