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Finding the Fourth Proportional to 664,214.40, 996,321.60 and 309,920.40

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Solution

The fourth proportional to 664,214.40, 996,321.60 and 309,920.40 is: 464,880.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,214.40 : 996,321.60 = 309,920.40 : x
  2. Step 2: Convert to fraction form
    664,214.40/996,321.60 = 309,920.40/x
  3. Step 3: Cross multiply
    664,214.40x = 996,321.60 × 309,920.40
  4. Step 4: Simplify right side
    664,214.40x = 308,780,388,800.64
  5. Step 5: Solve for x
    x = 308,780,388,800.64/664,214.40
  6. Step 6: Final answer
    x = 464,880.60

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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.