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Finding the Fourth Proportional to 663,694.40, 995,930.40 and 243,012.80

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Solution

The fourth proportional to 663,694.40, 995,930.40 and 243,012.80 is: 364,661.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,694.40 : 995,930.40 = 243,012.80 : x
  2. Step 2: Convert to fraction form
    663,694.40/995,930.40 = 243,012.80/x
  3. Step 3: Cross multiply
    663,694.40x = 995,930.40 × 243,012.80
  4. Step 4: Simplify right side
    663,694.40x = 242,023,835,109.12
  5. Step 5: Solve for x
    x = 242,023,835,109.12/663,694.40
  6. Step 6: Final answer
    x = 364,661.56

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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.