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Finding the Fourth Proportional to 2,159.03, 3,238.54 and 861.41

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Solution

The fourth proportional to 2,159.03, 3,238.54 and 861.41 is: 1,292.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,159.03 : 3,238.54 = 861.41 : x
  2. Step 2: Convert to fraction form
    2,159.03/3,238.54 = 861.41/x
  3. Step 3: Cross multiply
    2,159.03x = 3,238.54 × 861.41
  4. Step 4: Simplify right side
    2,159.03x = 2,789,690.24
  5. Step 5: Solve for x
    x = 2,789,690.24/2,159.03
  6. Step 6: Final answer
    x = 1,292.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.