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Finding the Fourth Proportional to 443,659.36, 665,601.31 and 123,811.20

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Solution

The fourth proportional to 443,659.36, 665,601.31 and 123,811.20 is: 185,748.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,659.36 : 665,601.31 = 123,811.20 : x
  2. Step 2: Convert to fraction form
    443,659.36/665,601.31 = 123,811.20/x
  3. Step 3: Cross multiply
    443,659.36x = 665,601.31 × 123,811.20
  4. Step 4: Simplify right side
    443,659.36x = 82,408,896,912.67
  5. Step 5: Solve for x
    x = 82,408,896,912.67/443,659.36
  6. Step 6: Final answer
    x = 185,748.13

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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.