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Finding the Fourth Proportional to 664,490.70, 996,881.85 and 215,135.10

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Solution

The fourth proportional to 664,490.70, 996,881.85 and 215,135.10 is: 322,749.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,490.70 : 996,881.85 = 215,135.10 : x
  2. Step 2: Convert to fraction form
    664,490.70/996,881.85 = 215,135.10/x
  3. Step 3: Cross multiply
    664,490.70x = 996,881.85 × 215,135.10
  4. Step 4: Simplify right side
    664,490.70x = 214,464,276,487.94
  5. Step 5: Solve for x
    x = 214,464,276,487.94/664,490.70
  6. Step 6: Final answer
    x = 322,749.85

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Double scale
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Similar ratio
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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.