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Finding the Fourth Proportional to 275,078.40, 379,607.88 and 154,219.71

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Solution

The fourth proportional to 275,078.40, 379,607.88 and 154,219.71 is: 212,823.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,078.40 : 379,607.88 = 154,219.71 : x
  2. Step 2: Convert to fraction form
    275,078.40/379,607.88 = 154,219.71/x
  3. Step 3: Cross multiply
    275,078.40x = 379,607.88 × 154,219.71
  4. Step 4: Simplify right side
    275,078.40x = 58,543,017,167.31
  5. Step 5: Solve for x
    x = 58,543,017,167.31/275,078.40
  6. Step 6: Final answer
    x = 212,823.02

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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.