Home / 1,628.08-2,246.82-920.20

Finding the Fourth Proportional to 1,628.08, 2,246.82 and 920.20

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Solution

The fourth proportional to 1,628.08, 2,246.82 and 920.20 is: 1,269.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,628.08 : 2,246.82 = 920.20 : x
  2. Step 2: Convert to fraction form
    1,628.08/2,246.82 = 920.20/x
  3. Step 3: Cross multiply
    1,628.08x = 2,246.82 × 920.20
  4. Step 4: Simplify right side
    1,628.08x = 2,067,523.76
  5. Step 5: Solve for x
    x = 2,067,523.76/1,628.08
  6. Step 6: Final answer
    x = 1,269.92

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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.