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Finding the Fourth Proportional to 664,646.20, 996,969.30 and 345,781.60

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Solution

The fourth proportional to 664,646.20, 996,969.30 and 345,781.60 is: 518,672.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,646.20 : 996,969.30 = 345,781.60 : x
  2. Step 2: Convert to fraction form
    664,646.20/996,969.30 = 345,781.60/x
  3. Step 3: Cross multiply
    664,646.20x = 996,969.30 × 345,781.60
  4. Step 4: Simplify right side
    664,646.20x = 344,733,639,704.88
  5. Step 5: Solve for x
    x = 344,733,639,704.88/664,646.20
  6. Step 6: Final answer
    x = 518,672.40

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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.