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Finding the Fourth Proportional to 664,443.80, 996,665.70 and 243,883.70

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Solution

The fourth proportional to 664,443.80, 996,665.70 and 243,883.70 is: 365,825.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,443.80 : 996,665.70 = 243,883.70 : x
  2. Step 2: Convert to fraction form
    664,443.80/996,665.70 = 243,883.70/x
  3. Step 3: Cross multiply
    664,443.80x = 996,665.70 × 243,883.70
  4. Step 4: Simplify right side
    664,443.80x = 243,070,518,579.09
  5. Step 5: Solve for x
    x = 243,070,518,579.09/664,443.80
  6. Step 6: Final answer
    x = 365,825.55

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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.