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Finding the Fourth Proportional to 443,754.08, 665,499.72 and 128,213.84

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Solution

The fourth proportional to 443,754.08, 665,499.72 and 128,213.84 is: 192,282.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,754.08 : 665,499.72 = 128,213.84 : x
  2. Step 2: Convert to fraction form
    443,754.08/665,499.72 = 128,213.84/x
  3. Step 3: Cross multiply
    443,754.08x = 665,499.72 × 128,213.84
  4. Step 4: Simplify right side
    443,754.08x = 85,326,274,620.12
  5. Step 5: Solve for x
    x = 85,326,274,620.12/443,754.08
  6. Step 6: Final answer
    x = 192,282.79

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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.