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Finding the Fourth Proportional to 664,280.80, 996,421.20 and 384,344.80

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Solution

The fourth proportional to 664,280.80, 996,421.20 and 384,344.80 is: 576,517.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,280.80 : 996,421.20 = 384,344.80 : x
  2. Step 2: Convert to fraction form
    664,280.80/996,421.20 = 384,344.80/x
  3. Step 3: Cross multiply
    664,280.80x = 996,421.20 × 384,344.80
  4. Step 4: Simplify right side
    664,280.80x = 382,969,306,829.76
  5. Step 5: Solve for x
    x = 382,969,306,829.76/664,280.80
  6. Step 6: Final answer
    x = 576,517.20

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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.