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Finding the Fourth Proportional to 275,299.65, 379,916.11 and 154,443.53

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Solution

The fourth proportional to 275,299.65, 379,916.11 and 154,443.53 is: 213,133.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,299.65 : 379,916.11 = 154,443.53 : x
  2. Step 2: Convert to fraction form
    275,299.65/379,916.11 = 154,443.53/x
  3. Step 3: Cross multiply
    275,299.65x = 379,916.11 × 154,443.53
  4. Step 4: Simplify right side
    275,299.65x = 58,675,586,275.11
  5. Step 5: Solve for x
    x = 58,675,586,275.11/275,299.65
  6. Step 6: Final answer
    x = 213,133.53

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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.