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Finding the Fourth Proportional to 664,384.60, 996,722.70 and 215,126.20

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Solution

The fourth proportional to 664,384.60, 996,722.70 and 215,126.20 is: 322,736.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,384.60 : 996,722.70 = 215,126.20 : x
  2. Step 2: Convert to fraction form
    664,384.60/996,722.70 = 215,126.20/x
  3. Step 3: Cross multiply
    664,384.60x = 996,722.70 × 215,126.20
  4. Step 4: Simplify right side
    664,384.60x = 214,421,166,904.74
  5. Step 5: Solve for x
    x = 214,421,166,904.74/664,384.60
  6. Step 6: Final answer
    x = 322,736.51

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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.