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Finding the Fourth Proportional to 664,340.60, 996,656.70 and 215,082.20

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Solution

The fourth proportional to 664,340.60, 996,656.70 and 215,082.20 is: 322,670.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,340.60 : 996,656.70 = 215,082.20 : x
  2. Step 2: Convert to fraction form
    664,340.60/996,656.70 = 215,082.20/x
  3. Step 3: Cross multiply
    664,340.60x = 996,656.70 × 215,082.20
  4. Step 4: Simplify right side
    664,340.60x = 214,363,115,680.74
  5. Step 5: Solve for x
    x = 214,363,115,680.74/664,340.60
  6. Step 6: Final answer
    x = 322,670.50

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Double scale
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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.