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Finding the Fourth Proportional to 664,095.40, 996,143.10 and 215,128.60

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Solution

The fourth proportional to 664,095.40, 996,143.10 and 215,128.60 is: 322,692.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,095.40 : 996,143.10 = 215,128.60 : x
  2. Step 2: Convert to fraction form
    664,095.40/996,143.10 = 215,128.60/x
  3. Step 3: Cross multiply
    664,095.40x = 996,143.10 × 215,128.60
  4. Step 4: Simplify right side
    664,095.40x = 214,298,870,502.66
  5. Step 5: Solve for x
    x = 214,298,870,502.66/664,095.40
  6. Step 6: Final answer
    x = 322,692.90

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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.