Home / 2,125.05-3,188.18-664.21

Finding the Fourth Proportional to 2,125.05, 3,188.18 and 664.21

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Solution

The fourth proportional to 2,125.05, 3,188.18 and 664.21 is: 996.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,125.05 : 3,188.18 = 664.21 : x
  2. Step 2: Convert to fraction form
    2,125.05/3,188.18 = 664.21/x
  3. Step 3: Cross multiply
    2,125.05x = 3,188.18 × 664.21
  4. Step 4: Simplify right side
    2,125.05x = 2,117,621.04
  5. Step 5: Solve for x
    x = 2,117,621.04/2,125.05
  6. Step 6: Final answer
    x = 996.50

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Double scale
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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.