Home / 1,225.92-1,837.62-640.61

Finding the Fourth Proportional to 1,225.92, 1,837.62 and 640.61

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Solution

The fourth proportional to 1,225.92, 1,837.62 and 640.61 is: 960.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,225.92 : 1,837.62 = 640.61 : x
  2. Step 2: Convert to fraction form
    1,225.92/1,837.62 = 640.61/x
  3. Step 3: Cross multiply
    1,225.92x = 1,837.62 × 640.61
  4. Step 4: Simplify right side
    1,225.92x = 1,177,204.74
  5. Step 5: Solve for x
    x = 1,177,204.74/1,225.92
  6. Step 6: Final answer
    x = 960.26

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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.