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Finding the Fourth Proportional to 889.18, 1,324.83 and 839.50

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Solution

The fourth proportional to 889.18, 1,324.83 and 839.50 is: 1,250.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.18 : 1,324.83 = 839.50 : x
  2. Step 2: Convert to fraction form
    889.18/1,324.83 = 839.50/x
  3. Step 3: Cross multiply
    889.18x = 1,324.83 × 839.50
  4. Step 4: Simplify right side
    889.18x = 1,112,194.79
  5. Step 5: Solve for x
    x = 1,112,194.79/889.18
  6. Step 6: Final answer
    x = 1,250.81

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.