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Finding the Fourth Proportional to 664,581.70, 996,872.55 and 309,631.60

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Solution

The fourth proportional to 664,581.70, 996,872.55 and 309,631.60 is: 464,447.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,581.70 : 996,872.55 = 309,631.60 : x
  2. Step 2: Convert to fraction form
    664,581.70/996,872.55 = 309,631.60/x
  3. Step 3: Cross multiply
    664,581.70x = 996,872.55 × 309,631.60
  4. Step 4: Simplify right side
    664,581.70x = 308,663,242,652.58
  5. Step 5: Solve for x
    x = 308,663,242,652.58/664,581.70
  6. Step 6: Final answer
    x = 464,447.40

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Half scale
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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.