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Finding the Fourth Proportional to 664,811.40, 996,954.64 and 243,857.64

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Solution

The fourth proportional to 664,811.40, 996,954.64 and 243,857.64 is: 365,690.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,811.40 : 996,954.64 = 243,857.64 : x
  2. Step 2: Convert to fraction form
    664,811.40/996,954.64 = 243,857.64/x
  3. Step 3: Cross multiply
    664,811.40x = 996,954.64 × 243,857.64
  4. Step 4: Simplify right side
    664,811.40x = 243,115,005,697.45
  5. Step 5: Solve for x
    x = 243,115,005,697.45/664,811.40
  6. Step 6: Final answer
    x = 365,690.19

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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.