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Finding the Fourth Proportional to 275,566.31, 380,303.49 and 154,715.54

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Solution

The fourth proportional to 275,566.31, 380,303.49 and 154,715.54 is: 213,519.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,566.31 : 380,303.49 = 154,715.54 : x
  2. Step 2: Convert to fraction form
    275,566.31/380,303.49 = 154,715.54/x
  3. Step 3: Cross multiply
    275,566.31x = 380,303.49 × 154,715.54
  4. Step 4: Simplify right side
    275,566.31x = 58,838,859,819.23
  5. Step 5: Solve for x
    x = 58,838,859,819.23/275,566.31
  6. Step 6: Final answer
    x = 213,519.79

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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.