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Finding the Fourth Proportional to 256,545.45, 384,860.30 and 79,052.49

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Solution

The fourth proportional to 256,545.45, 384,860.30 and 79,052.49 is: 118,591.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,545.45 : 384,860.30 = 79,052.49 : x
  2. Step 2: Convert to fraction form
    256,545.45/384,860.30 = 79,052.49/x
  3. Step 3: Cross multiply
    256,545.45x = 384,860.30 × 79,052.49
  4. Step 4: Simplify right side
    256,545.45x = 30,424,164,621.88
  5. Step 5: Solve for x
    x = 30,424,164,621.88/256,545.45
  6. Step 6: Final answer
    x = 118,591.71

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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.