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Finding the Fourth Proportional to 543,121.50, 749,507.67 and 331,153.50

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Solution

The fourth proportional to 543,121.50, 749,507.67 and 331,153.50 is: 456,991.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,121.50 : 749,507.67 = 331,153.50 : x
  2. Step 2: Convert to fraction form
    543,121.50/749,507.67 = 331,153.50/x
  3. Step 3: Cross multiply
    543,121.50x = 749,507.67 × 331,153.50
  4. Step 4: Simplify right side
    543,121.50x = 248,202,088,197.35
  5. Step 5: Solve for x
    x = 248,202,088,197.35/543,121.50
  6. Step 6: Final answer
    x = 456,991.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.