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Finding the Fourth Proportional to 275,665.95, 380,428.20 and 154,828.53

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Solution

The fourth proportional to 275,665.95, 380,428.20 and 154,828.53 is: 213,668.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,665.95 : 380,428.20 = 154,828.53 : x
  2. Step 2: Convert to fraction form
    275,665.95/380,428.20 = 154,828.53/x
  3. Step 3: Cross multiply
    275,665.95x = 380,428.20 × 154,828.53
  4. Step 4: Simplify right side
    275,665.95x = 58,901,138,976.55
  5. Step 5: Solve for x
    x = 58,901,138,976.55/275,665.95
  6. Step 6: Final answer
    x = 213,668.53

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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.