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Finding the Fourth Proportional to 512,579.40, 768,869.10 and 228,269.40

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Solution

The fourth proportional to 512,579.40, 768,869.10 and 228,269.40 is: 342,404.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,579.40 : 768,869.10 = 228,269.40 : x
  2. Step 2: Convert to fraction form
    512,579.40/768,869.10 = 228,269.40/x
  3. Step 3: Cross multiply
    512,579.40x = 768,869.10 × 228,269.40
  4. Step 4: Simplify right side
    512,579.40x = 175,509,288,135.54
  5. Step 5: Solve for x
    x = 175,509,288,135.54/512,579.40
  6. Step 6: Final answer
    x = 342,404.10

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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.