Home / 3,128.84-4,317.78-1,802.80

Finding the Fourth Proportional to 3,128.84, 4,317.78 and 1,802.80

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Solution

The fourth proportional to 3,128.84, 4,317.78 and 1,802.80 is: 2,487.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.84 : 4,317.78 = 1,802.80 : x
  2. Step 2: Convert to fraction form
    3,128.84/4,317.78 = 1,802.80/x
  3. Step 3: Cross multiply
    3,128.84x = 4,317.78 × 1,802.80
  4. Step 4: Simplify right side
    3,128.84x = 7,784,093.78
  5. Step 5: Solve for x
    x = 7,784,093.78/3,128.84
  6. Step 6: Final answer
    x = 2,487.85

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1.5x scale

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.