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Finding the Fourth Proportional to 1,643.94, 2,268.26 and 980.66

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Solution

The fourth proportional to 1,643.94, 2,268.26 and 980.66 is: 1,353.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,643.94 : 2,268.26 = 980.66 : x
  2. Step 2: Convert to fraction form
    1,643.94/2,268.26 = 980.66/x
  3. Step 3: Cross multiply
    1,643.94x = 2,268.26 × 980.66
  4. Step 4: Simplify right side
    1,643.94x = 2,224,375.61
  5. Step 5: Solve for x
    x = 2,224,375.61/1,643.94
  6. Step 6: Final answer
    x = 1,353.08

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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.