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Finding the Fourth Proportional to 889.18, 1,340.43 and 829.71

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Solution

The fourth proportional to 889.18, 1,340.43 and 829.71 is: 1,250.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.18 : 1,340.43 = 829.71 : x
  2. Step 2: Convert to fraction form
    889.18/1,340.43 = 829.71/x
  3. Step 3: Cross multiply
    889.18x = 1,340.43 × 829.71
  4. Step 4: Simplify right side
    889.18x = 1,112,168.18
  5. Step 5: Solve for x
    x = 1,112,168.18/889.18
  6. Step 6: Final answer
    x = 1,250.78

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.