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Finding the Fourth Proportional to 664,443.40, 996,665.10 and 243,664.60

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Solution

The fourth proportional to 664,443.40, 996,665.10 and 243,664.60 is: 365,496.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,443.40 : 996,665.10 = 243,664.60 : x
  2. Step 2: Convert to fraction form
    664,443.40/996,665.10 = 243,664.60/x
  3. Step 3: Cross multiply
    664,443.40x = 996,665.10 × 243,664.60
  4. Step 4: Simplify right side
    664,443.40x = 242,852,002,925.46
  5. Step 5: Solve for x
    x = 242,852,002,925.46/664,443.40
  6. Step 6: Final answer
    x = 365,496.90

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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.