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Finding the Fourth Proportional to 253,149.40, 379,724.46 and 103,389.72

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Solution

The fourth proportional to 253,149.40, 379,724.46 and 103,389.72 is: 155,084.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,149.40 : 379,724.46 = 103,389.72 : x
  2. Step 2: Convert to fraction form
    253,149.40/379,724.46 = 103,389.72/x
  3. Step 3: Cross multiply
    253,149.40x = 379,724.46 × 103,389.72
  4. Step 4: Simplify right side
    253,149.40x = 39,259,605,596.55
  5. Step 5: Solve for x
    x = 39,259,605,596.55/253,149.40
  6. Step 6: Final answer
    x = 155,084.73

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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.