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Finding the Fourth Proportional to 512,492.10, 768,738.15 and 326,328.90

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Solution

The fourth proportional to 512,492.10, 768,738.15 and 326,328.90 is: 489,493.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,492.10 : 768,738.15 = 326,328.90 : x
  2. Step 2: Convert to fraction form
    512,492.10/768,738.15 = 326,328.90/x
  3. Step 3: Cross multiply
    512,492.10x = 768,738.15 × 326,328.90
  4. Step 4: Simplify right side
    512,492.10x = 250,861,474,877.54
  5. Step 5: Solve for x
    x = 250,861,474,877.54/512,492.10
  6. Step 6: Final answer
    x = 489,493.35

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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.