Home / 3,128.92-4,317.91-1,802.61

Finding the Fourth Proportional to 3,128.92, 4,317.91 and 1,802.61

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Solution

The fourth proportional to 3,128.92, 4,317.91 and 1,802.61 is: 2,487.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.92 : 4,317.91 = 1,802.61 : x
  2. Step 2: Convert to fraction form
    3,128.92/4,317.91 = 1,802.61/x
  3. Step 3: Cross multiply
    3,128.92x = 4,317.91 × 1,802.61
  4. Step 4: Simplify right side
    3,128.92x = 7,783,503.24
  5. Step 5: Solve for x
    x = 7,783,503.24/3,128.92
  6. Step 6: Final answer
    x = 2,487.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.