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Finding the Fourth Proportional to 889.12, 1,230.42 and 834.58

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Solution

The fourth proportional to 889.12, 1,230.42 and 834.58 is: 1,154.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.12 : 1,230.42 = 834.58 : x
  2. Step 2: Convert to fraction form
    889.12/1,230.42 = 834.58/x
  3. Step 3: Cross multiply
    889.12x = 1,230.42 × 834.58
  4. Step 4: Simplify right side
    889.12x = 1,026,883.92
  5. Step 5: Solve for x
    x = 1,026,883.92/889.12
  6. Step 6: Final answer
    x = 1,154.94

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.