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Finding the Fourth Proportional to 664,298.30, 996,544.65 and 214,942.70

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Solution

The fourth proportional to 664,298.30, 996,544.65 and 214,942.70 is: 322,445.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,298.30 : 996,544.65 = 214,942.70 : x
  2. Step 2: Convert to fraction form
    664,298.30/996,544.65 = 214,942.70/x
  3. Step 3: Cross multiply
    664,298.30x = 996,544.65 × 214,942.70
  4. Step 4: Simplify right side
    664,298.30x = 214,199,997,741.56
  5. Step 5: Solve for x
    x = 214,199,997,741.56/664,298.30
  6. Step 6: Final answer
    x = 322,445.50

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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.