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Finding the Fourth Proportional to 847.87, 1,271.79 and 231.59

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Solution

The fourth proportional to 847.87, 1,271.79 and 231.59 is: 347.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    847.87 : 1,271.79 = 231.59 : x
  2. Step 2: Convert to fraction form
    847.87/1,271.79 = 231.59/x
  3. Step 3: Cross multiply
    847.87x = 1,271.79 × 231.59
  4. Step 4: Simplify right side
    847.87x = 294,537.03
  5. Step 5: Solve for x
    x = 294,537.03/847.87
  6. Step 6: Final answer
    x = 347.39

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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.