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Finding the Fourth Proportional to 2,158.97, 3,237.48 and 859.50

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Solution

The fourth proportional to 2,158.97, 3,237.48 and 859.50 is: 1,288.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,158.97 : 3,237.48 = 859.50 : x
  2. Step 2: Convert to fraction form
    2,158.97/3,237.48 = 859.50/x
  3. Step 3: Cross multiply
    2,158.97x = 3,237.48 × 859.50
  4. Step 4: Simplify right side
    2,158.97x = 2,782,614.06
  5. Step 5: Solve for x
    x = 2,782,614.06/2,158.97
  6. Step 6: Final answer
    x = 1,288.86

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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.