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Finding the Fourth Proportional to 443,912.96, 665,888.88 and 128,401.76

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Solution

The fourth proportional to 443,912.96, 665,888.88 and 128,401.76 is: 192,608.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,912.96 : 665,888.88 = 128,401.76 : x
  2. Step 2: Convert to fraction form
    443,912.96/665,888.88 = 128,401.76/x
  3. Step 3: Cross multiply
    443,912.96x = 665,888.88 × 128,401.76
  4. Step 4: Simplify right side
    443,912.96x = 85,501,304,156.43
  5. Step 5: Solve for x
    x = 85,501,304,156.43/443,912.96
  6. Step 6: Final answer
    x = 192,608.26

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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.