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Finding the Fourth Proportional to 900.06, 1,234.76 and 891.55

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Solution

The fourth proportional to 900.06, 1,234.76 and 891.55 is: 1,223.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    900.06 : 1,234.76 = 891.55 : x
  2. Step 2: Convert to fraction form
    900.06/1,234.76 = 891.55/x
  3. Step 3: Cross multiply
    900.06x = 1,234.76 × 891.55
  4. Step 4: Simplify right side
    900.06x = 1,100,850.28
  5. Step 5: Solve for x
    x = 1,100,850.28/900.06
  6. Step 6: Final answer
    x = 1,223.09

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.