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Finding the Fourth Proportional to 621,806.20, 932,709.30 and 486,503.80

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Solution

The fourth proportional to 621,806.20, 932,709.30 and 486,503.80 is: 729,755.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,806.20 : 932,709.30 = 486,503.80 : x
  2. Step 2: Convert to fraction form
    621,806.20/932,709.30 = 486,503.80/x
  3. Step 3: Cross multiply
    621,806.20x = 932,709.30 × 486,503.80
  4. Step 4: Simplify right side
    621,806.20x = 453,766,618,745.34
  5. Step 5: Solve for x
    x = 453,766,618,745.34/621,806.20
  6. Step 6: Final answer
    x = 729,755.70

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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.