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Finding the Fourth Proportional to 463,121.76, 639,039.60 and 261,913.44

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Solution

The fourth proportional to 463,121.76, 639,039.60 and 261,913.44 is: 361,401.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    463,121.76 : 639,039.60 = 261,913.44 : x
  2. Step 2: Convert to fraction form
    463,121.76/639,039.60 = 261,913.44/x
  3. Step 3: Cross multiply
    463,121.76x = 639,039.60 × 261,913.44
  4. Step 4: Simplify right side
    463,121.76x = 167,373,059,932.22
  5. Step 5: Solve for x
    x = 167,373,059,932.22/463,121.76
  6. Step 6: Final answer
    x = 361,401.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.