Home / 1,628.11-2,246.81-919.99

Finding the Fourth Proportional to 1,628.11, 2,246.81 and 919.99

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Solution

The fourth proportional to 1,628.11, 2,246.81 and 919.99 is: 1,269.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,628.11 : 2,246.81 = 919.99 : x
  2. Step 2: Convert to fraction form
    1,628.11/2,246.81 = 919.99/x
  3. Step 3: Cross multiply
    1,628.11x = 2,246.81 × 919.99
  4. Step 4: Simplify right side
    1,628.11x = 2,067,042.73
  5. Step 5: Solve for x
    x = 2,067,042.73/1,628.11
  6. Step 6: Final answer
    x = 1,269.60

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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.