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Finding the Fourth Proportional to 664,363.50, 996,545.25 and 215,459.88

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Solution

The fourth proportional to 664,363.50, 996,545.25 and 215,459.88 is: 323,189.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,363.50 : 996,545.25 = 215,459.88 : x
  2. Step 2: Convert to fraction form
    664,363.50/996,545.25 = 215,459.88/x
  3. Step 3: Cross multiply
    664,363.50x = 996,545.25 × 215,459.88
  4. Step 4: Simplify right side
    664,363.50x = 214,715,519,979.57
  5. Step 5: Solve for x
    x = 214,715,519,979.57/664,363.50
  6. Step 6: Final answer
    x = 323,189.82

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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.