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Finding the Fourth Proportional to 2,129.36, 3,193.94 and 648.53

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Solution

The fourth proportional to 2,129.36, 3,193.94 and 648.53 is: 972.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,129.36 : 3,193.94 = 648.53 : x
  2. Step 2: Convert to fraction form
    2,129.36/3,193.94 = 648.53/x
  3. Step 3: Cross multiply
    2,129.36x = 3,193.94 × 648.53
  4. Step 4: Simplify right side
    2,129.36x = 2,071,365.91
  5. Step 5: Solve for x
    x = 2,071,365.91/2,129.36
  6. Step 6: Final answer
    x = 972.76

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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.