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Finding the Fourth Proportional to 2,143.82, 2,958.48 and 1,259.63

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Solution

The fourth proportional to 2,143.82, 2,958.48 and 1,259.63 is: 1,738.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,143.82 : 2,958.48 = 1,259.63 : x
  2. Step 2: Convert to fraction form
    2,143.82/2,958.48 = 1,259.63/x
  3. Step 3: Cross multiply
    2,143.82x = 2,958.48 × 1,259.63
  4. Step 4: Simplify right side
    2,143.82x = 3,726,597.56
  5. Step 5: Solve for x
    x = 3,726,597.56/2,143.82
  6. Step 6: Final answer
    x = 1,738.30

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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.