Home / 664,217.40-996,326.10-309,923.40

Finding the Fourth Proportional to 664,217.40, 996,326.10 and 309,923.40

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Solution

The fourth proportional to 664,217.40, 996,326.10 and 309,923.40 is: 464,885.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,217.40 : 996,326.10 = 309,923.40 : x
  2. Step 2: Convert to fraction form
    664,217.40/996,326.10 = 309,923.40/x
  3. Step 3: Cross multiply
    664,217.40x = 996,326.10 × 309,923.40
  4. Step 4: Simplify right side
    664,217.40x = 308,784,772,420.74
  5. Step 5: Solve for x
    x = 308,784,772,420.74/664,217.40
  6. Step 6: Final answer
    x = 464,885.10

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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.