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Finding the Fourth Proportional to 664,615.20, 996,922.80 and 309,665.10

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Solution

The fourth proportional to 664,615.20, 996,922.80 and 309,665.10 is: 464,497.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,615.20 : 996,922.80 = 309,665.10 : x
  2. Step 2: Convert to fraction form
    664,615.20/996,922.80 = 309,665.10/x
  3. Step 3: Cross multiply
    664,615.20x = 996,922.80 × 309,665.10
  4. Step 4: Simplify right side
    664,615.20x = 308,712,198,554.28
  5. Step 5: Solve for x
    x = 308,712,198,554.28/664,615.20
  6. Step 6: Final answer
    x = 464,497.65

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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.