Home / 1,645.16-2,268.26-1,421.16

Finding the Fourth Proportional to 1,645.16, 2,268.26 and 1,421.16

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Solution

The fourth proportional to 1,645.16, 2,268.26 and 1,421.16 is: 1,959.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,645.16 : 2,268.26 = 1,421.16 : x
  2. Step 2: Convert to fraction form
    1,645.16/2,268.26 = 1,421.16/x
  3. Step 3: Cross multiply
    1,645.16x = 2,268.26 × 1,421.16
  4. Step 4: Simplify right side
    1,645.16x = 3,223,560.38
  5. Step 5: Solve for x
    x = 3,223,560.38/1,645.16
  6. Step 6: Final answer
    x = 1,959.42

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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.