Home / 1,643.25-2,268.51-1,178.31

Finding the Fourth Proportional to 1,643.25, 2,268.51 and 1,178.31

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Solution

The fourth proportional to 1,643.25, 2,268.51 and 1,178.31 is: 1,626.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,643.25 : 2,268.51 = 1,178.31 : x
  2. Step 2: Convert to fraction form
    1,643.25/2,268.51 = 1,178.31/x
  3. Step 3: Cross multiply
    1,643.25x = 2,268.51 × 1,178.31
  4. Step 4: Simplify right side
    1,643.25x = 2,673,008.02
  5. Step 5: Solve for x
    x = 2,673,008.02/1,643.25
  6. Step 6: Final answer
    x = 1,626.66

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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.