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Finding the Fourth Proportional to 859.51, 1,289.27 and 243.22

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Solution

The fourth proportional to 859.51, 1,289.27 and 243.22 is: 364.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    859.51 : 1,289.27 = 243.22 : x
  2. Step 2: Convert to fraction form
    859.51/1,289.27 = 243.22/x
  3. Step 3: Cross multiply
    859.51x = 1,289.27 × 243.22
  4. Step 4: Simplify right side
    859.51x = 313,576.25
  5. Step 5: Solve for x
    x = 313,576.25/859.51
  6. Step 6: Final answer
    x = 364.83

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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.