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Finding the Fourth Proportional to 664,596.80, 996,895.20 and 384,660.80

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Solution

The fourth proportional to 664,596.80, 996,895.20 and 384,660.80 is: 576,991.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,596.80 : 996,895.20 = 384,660.80 : x
  2. Step 2: Convert to fraction form
    664,596.80/996,895.20 = 384,660.80/x
  3. Step 3: Cross multiply
    664,596.80x = 996,895.20 × 384,660.80
  4. Step 4: Simplify right side
    664,596.80x = 383,466,505,148.16
  5. Step 5: Solve for x
    x = 383,466,505,148.16/664,596.80
  6. Step 6: Final answer
    x = 576,991.20

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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.