Home / 1,620.33-2,236.85-1,239.09

Finding the Fourth Proportional to 1,620.33, 2,236.85 and 1,239.09

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Solution

The fourth proportional to 1,620.33, 2,236.85 and 1,239.09 is: 1,710.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,620.33 : 2,236.85 = 1,239.09 : x
  2. Step 2: Convert to fraction form
    1,620.33/2,236.85 = 1,239.09/x
  3. Step 3: Cross multiply
    1,620.33x = 2,236.85 × 1,239.09
  4. Step 4: Simplify right side
    1,620.33x = 2,771,641.09
  5. Step 5: Solve for x
    x = 2,771,641.09/1,620.33
  6. Step 6: Final answer
    x = 1,710.55

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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.