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Finding the Fourth Proportional to 1,635.89, 2,453.45 and 648.39

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Solution

The fourth proportional to 1,635.89, 2,453.45 and 648.39 is: 972.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,635.89 : 2,453.45 = 648.39 : x
  2. Step 2: Convert to fraction form
    1,635.89/2,453.45 = 648.39/x
  3. Step 3: Cross multiply
    1,635.89x = 2,453.45 × 648.39
  4. Step 4: Simplify right side
    1,635.89x = 1,590,789.20
  5. Step 5: Solve for x
    x = 1,590,789.20/1,635.89
  6. Step 6: Final answer
    x = 972.43

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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.