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Finding the Fourth Proportional to 438,200.89, 655,571.90 and 331,891.16

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Solution

The fourth proportional to 438,200.89, 655,571.90 and 331,891.16 is: 496,526.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,200.89 : 655,571.90 = 331,891.16 : x
  2. Step 2: Convert to fraction form
    438,200.89/655,571.90 = 331,891.16/x
  3. Step 3: Cross multiply
    438,200.89x = 655,571.90 × 331,891.16
  4. Step 4: Simplify right side
    438,200.89x = 217,578,518,333.88
  5. Step 5: Solve for x
    x = 217,578,518,333.88/438,200.89
  6. Step 6: Final answer
    x = 496,526.88

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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.