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Finding the Fourth Proportional to 986.26, 1,478.94 and 575.54

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Solution

The fourth proportional to 986.26, 1,478.94 and 575.54 is: 863.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    986.26 : 1,478.94 = 575.54 : x
  2. Step 2: Convert to fraction form
    986.26/1,478.94 = 575.54/x
  3. Step 3: Cross multiply
    986.26x = 1,478.94 × 575.54
  4. Step 4: Simplify right side
    986.26x = 851,189.13
  5. Step 5: Solve for x
    x = 851,189.13/986.26
  6. Step 6: Final answer
    x = 863.05

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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.