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Finding the Fourth Proportional to 900.60, 1,343.21 and 885

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Solution

The fourth proportional to 900.60, 1,343.21 and 885 is: 1,319.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    900.60 : 1,343.21 = 885 : x
  2. Step 2: Convert to fraction form
    900.60/1,343.21 = 885/x
  3. Step 3: Cross multiply
    900.60x = 1,343.21 × 885
  4. Step 4: Simplify right side
    900.60x = 1,188,740.85
  5. Step 5: Solve for x
    x = 1,188,740.85/900.60
  6. Step 6: Final answer
    x = 1,319.94

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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.