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Finding the Fourth Proportional to 664,906.80, 997,360.20 and 384,279.60

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Solution

The fourth proportional to 664,906.80, 997,360.20 and 384,279.60 is: 576,419.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,906.80 : 997,360.20 = 384,279.60 : x
  2. Step 2: Convert to fraction form
    664,906.80/997,360.20 = 384,279.60/x
  3. Step 3: Cross multiply
    664,906.80x = 997,360.20 × 384,279.60
  4. Step 4: Simplify right side
    664,906.80x = 383,265,178,711.92
  5. Step 5: Solve for x
    x = 383,265,178,711.92/664,906.80
  6. Step 6: Final answer
    x = 576,419.40

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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.