Home / 1,358.30-2,028.81-1,228.10

Finding the Fourth Proportional to 1,358.30, 2,028.81 and 1,228.10

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Solution

The fourth proportional to 1,358.30, 2,028.81 and 1,228.10 is: 1,834.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,358.30 : 2,028.81 = 1,228.10 : x
  2. Step 2: Convert to fraction form
    1,358.30/2,028.81 = 1,228.10/x
  3. Step 3: Cross multiply
    1,358.30x = 2,028.81 × 1,228.10
  4. Step 4: Simplify right side
    1,358.30x = 2,491,576.02
  5. Step 5: Solve for x
    x = 2,491,576.02/1,358.30
  6. Step 6: Final answer
    x = 1,834.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.