Home / 2,428.75-3,351.68-1,380.81

Finding the Fourth Proportional to 2,428.75, 3,351.68 and 1,380.81

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Solution

The fourth proportional to 2,428.75, 3,351.68 and 1,380.81 is: 1,905.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,428.75 : 3,351.68 = 1,380.81 : x
  2. Step 2: Convert to fraction form
    2,428.75/3,351.68 = 1,380.81/x
  3. Step 3: Cross multiply
    2,428.75x = 3,351.68 × 1,380.81
  4. Step 4: Simplify right side
    2,428.75x = 4,628,044.10
  5. Step 5: Solve for x
    x = 4,628,044.10/2,428.75
  6. Step 6: Final answer
    x = 1,905.52

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Half scale
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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.