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Finding the Fourth Proportional to 275,079.40, 379,609.26 and 154,220.71

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Solution

The fourth proportional to 275,079.40, 379,609.26 and 154,220.71 is: 212,824.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,079.40 : 379,609.26 = 154,220.71 : x
  2. Step 2: Convert to fraction form
    275,079.40/379,609.26 = 154,220.71/x
  3. Step 3: Cross multiply
    275,079.40x = 379,609.26 × 154,220.71
  4. Step 4: Simplify right side
    275,079.40x = 58,543,609,599.77
  5. Step 5: Solve for x
    x = 58,543,609,599.77/275,079.40
  6. Step 6: Final answer
    x = 212,824.40

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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.