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Finding the Fourth Proportional to 2,128.92, 3,193.38 and 648.14

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Solution

The fourth proportional to 2,128.92, 3,193.38 and 648.14 is: 972.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,128.92 : 3,193.38 = 648.14 : x
  2. Step 2: Convert to fraction form
    2,128.92/3,193.38 = 648.14/x
  3. Step 3: Cross multiply
    2,128.92x = 3,193.38 × 648.14
  4. Step 4: Simplify right side
    2,128.92x = 2,069,757.31
  5. Step 5: Solve for x
    x = 2,069,757.31/2,128.92
  6. Step 6: Final answer
    x = 972.21

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1.5x scale

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.