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Finding the Fourth Proportional to 889.57, 1,336.29 and 860.41

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Solution

The fourth proportional to 889.57, 1,336.29 and 860.41 is: 1,292.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.57 : 1,336.29 = 860.41 : x
  2. Step 2: Convert to fraction form
    889.57/1,336.29 = 860.41/x
  3. Step 3: Cross multiply
    889.57x = 1,336.29 × 860.41
  4. Step 4: Simplify right side
    889.57x = 1,149,757.28
  5. Step 5: Solve for x
    x = 1,149,757.28/889.57
  6. Step 6: Final answer
    x = 1,292.49

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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.