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Finding the Fourth Proportional to 664,589.20, 996,883.80 and 309,639.10

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Solution

The fourth proportional to 664,589.20, 996,883.80 and 309,639.10 is: 464,458.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,589.20 : 996,883.80 = 309,639.10 : x
  2. Step 2: Convert to fraction form
    664,589.20/996,883.80 = 309,639.10/x
  3. Step 3: Cross multiply
    664,589.20x = 996,883.80 × 309,639.10
  4. Step 4: Simplify right side
    664,589.20x = 308,674,202,636.58
  5. Step 5: Solve for x
    x = 308,674,202,636.58/664,589.20
  6. Step 6: Final answer
    x = 464,458.65

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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.