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Finding the Fourth Proportional to 284,769.40, 427,121.70 and 74,428.60

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Solution

The fourth proportional to 284,769.40, 427,121.70 and 74,428.60 is: 111,634.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    284,769.40 : 427,121.70 = 74,428.60 : x
  2. Step 2: Convert to fraction form
    284,769.40/427,121.70 = 74,428.60/x
  3. Step 3: Cross multiply
    284,769.40x = 427,121.70 × 74,428.60
  4. Step 4: Simplify right side
    284,769.40x = 31,790,070,160.62
  5. Step 5: Solve for x
    x = 31,790,070,160.62/284,769.40
  6. Step 6: Final answer
    x = 111,634.43

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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.