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Finding the Fourth Proportional to 664,385.40, 996,578.10 and 243,606.60

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Solution

The fourth proportional to 664,385.40, 996,578.10 and 243,606.60 is: 365,409.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,385.40 : 996,578.10 = 243,606.60 : x
  2. Step 2: Convert to fraction form
    664,385.40/996,578.10 = 243,606.60/x
  3. Step 3: Cross multiply
    664,385.40x = 996,578.10 × 243,606.60
  4. Step 4: Simplify right side
    664,385.40x = 242,773,002,575.46
  5. Step 5: Solve for x
    x = 242,773,002,575.46/664,385.40
  6. Step 6: Final answer
    x = 365,409.90

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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.