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Finding the Fourth Proportional to 393,638.96, 587,387.06 and 351,227.36

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Solution

The fourth proportional to 393,638.96, 587,387.06 and 351,227.36 is: 524,100.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,638.96 : 587,387.06 = 351,227.36 : x
  2. Step 2: Convert to fraction form
    393,638.96/587,387.06 = 351,227.36/x
  3. Step 3: Cross multiply
    393,638.96x = 587,387.06 × 351,227.36
  4. Step 4: Simplify right side
    393,638.96x = 206,306,401,688.89
  5. Step 5: Solve for x
    x = 206,306,401,688.89/393,638.96
  6. Step 6: Final answer
    x = 524,100.57

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.