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Finding the Fourth Proportional to 1,628.25, 2,246.80 and 920.17

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Solution

The fourth proportional to 1,628.25, 2,246.80 and 920.17 is: 1,269.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,628.25 : 2,246.80 = 920.17 : x
  2. Step 2: Convert to fraction form
    1,628.25/2,246.80 = 920.17/x
  3. Step 3: Cross multiply
    1,628.25x = 2,246.80 × 920.17
  4. Step 4: Simplify right side
    1,628.25x = 2,067,444.64
  5. Step 5: Solve for x
    x = 2,067,444.64/1,628.25
  6. Step 6: Final answer
    x = 1,269.73

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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.