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Finding the Fourth Proportional to 664,012.80, 995,414.40 and 243,187.20

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Solution

The fourth proportional to 664,012.80, 995,414.40 and 243,187.20 is: 364,559.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,012.80 : 995,414.40 = 243,187.20 : x
  2. Step 2: Convert to fraction form
    664,012.80/995,414.40 = 243,187.20/x
  3. Step 3: Cross multiply
    664,012.80x = 995,414.40 × 243,187.20
  4. Step 4: Simplify right side
    664,012.80x = 242,072,040,775.68
  5. Step 5: Solve for x
    x = 242,072,040,775.68/664,012.80
  6. Step 6: Final answer
    x = 364,559.30

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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.