Home / 1,622.70-2,231.55-1,428.30

Finding the Fourth Proportional to 1,622.70, 2,231.55 and 1,428.30

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Solution

The fourth proportional to 1,622.70, 2,231.55 and 1,428.30 is: 1,964.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,622.70 : 2,231.55 = 1,428.30 : x
  2. Step 2: Convert to fraction form
    1,622.70/2,231.55 = 1,428.30/x
  3. Step 3: Cross multiply
    1,622.70x = 2,231.55 × 1,428.30
  4. Step 4: Simplify right side
    1,622.70x = 3,187,322.87
  5. Step 5: Solve for x
    x = 3,187,322.87/1,622.70
  6. Step 6: Final answer
    x = 1,964.21

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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.