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Finding the Fourth Proportional to 664,400.64, 996,008.40 and 243,578.40

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Solution

The fourth proportional to 664,400.64, 996,008.40 and 243,578.40 is: 365,150.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,400.64 : 996,008.40 = 243,578.40 : x
  2. Step 2: Convert to fraction form
    664,400.64/996,008.40 = 243,578.40/x
  3. Step 3: Cross multiply
    664,400.64x = 996,008.40 × 243,578.40
  4. Step 4: Simplify right side
    664,400.64x = 242,606,132,458.56
  5. Step 5: Solve for x
    x = 242,606,132,458.56/664,400.64
  6. Step 6: Final answer
    x = 365,150.36

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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.