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Finding the Fourth Proportional to 1,640.78, 2,461.17 and 546.37

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Solution

The fourth proportional to 1,640.78, 2,461.17 and 546.37 is: 819.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,640.78 : 2,461.17 = 546.37 : x
  2. Step 2: Convert to fraction form
    1,640.78/2,461.17 = 546.37/x
  3. Step 3: Cross multiply
    1,640.78x = 2,461.17 × 546.37
  4. Step 4: Simplify right side
    1,640.78x = 1,344,709.45
  5. Step 5: Solve for x
    x = 1,344,709.45/1,640.78
  6. Step 6: Final answer
    x = 819.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.