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Finding the Fourth Proportional to 1,628.39, 2,246.78 and 920.24

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Solution

The fourth proportional to 1,628.39, 2,246.78 and 920.24 is: 1,269.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,628.39 : 2,246.78 = 920.24 : x
  2. Step 2: Convert to fraction form
    1,628.39/2,246.78 = 920.24/x
  3. Step 3: Cross multiply
    1,628.39x = 2,246.78 × 920.24
  4. Step 4: Simplify right side
    1,628.39x = 2,067,584.74
  5. Step 5: Solve for x
    x = 2,067,584.74/1,628.39
  6. Step 6: Final answer
    x = 1,269.71

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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.