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Finding the Fourth Proportional to 908.00, 1,255.67 and 891.60

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Solution

The fourth proportional to 908.00, 1,255.67 and 891.60 is: 1,232.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    908.00 : 1,255.67 = 891.60 : x
  2. Step 2: Convert to fraction form
    908.00/1,255.67 = 891.60/x
  3. Step 3: Cross multiply
    908.00x = 1,255.67 × 891.60
  4. Step 4: Simplify right side
    908.00x = 1,119,550.91
  5. Step 5: Solve for x
    x = 1,119,550.91/908.00
  6. Step 6: Final answer
    x = 1,232.99

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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.