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Finding the Fourth Proportional to 663,757.20, 995,639.40 and 165,121.20

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Solution

The fourth proportional to 663,757.20, 995,639.40 and 165,121.20 is: 247,682.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,757.20 : 995,639.40 = 165,121.20 : x
  2. Step 2: Convert to fraction form
    663,757.20/995,639.40 = 165,121.20/x
  3. Step 3: Cross multiply
    663,757.20x = 995,639.40 × 165,121.20
  4. Step 4: Simplify right side
    663,757.20x = 164,401,172,495.28
  5. Step 5: Solve for x
    x = 164,401,172,495.28/663,757.20
  6. Step 6: Final answer
    x = 247,682.70

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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.