Home / 1,645.65-2,265.84-1,396.44

Finding the Fourth Proportional to 1,645.65, 2,265.84 and 1,396.44

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Solution

The fourth proportional to 1,645.65, 2,265.84 and 1,396.44 is: 1,922.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,645.65 : 2,265.84 = 1,396.44 : x
  2. Step 2: Convert to fraction form
    1,645.65/2,265.84 = 1,396.44/x
  3. Step 3: Cross multiply
    1,645.65x = 2,265.84 × 1,396.44
  4. Step 4: Simplify right side
    1,645.65x = 3,164,109.61
  5. Step 5: Solve for x
    x = 3,164,109.61/1,645.65
  6. Step 6: Final answer
    x = 1,922.71

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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.