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Finding the Fourth Proportional to 968.36, 1,449.80 and 891.81

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Solution

The fourth proportional to 968.36, 1,449.80 and 891.81 is: 1,335.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    968.36 : 1,449.80 = 891.81 : x
  2. Step 2: Convert to fraction form
    968.36/1,449.80 = 891.81/x
  3. Step 3: Cross multiply
    968.36x = 1,449.80 × 891.81
  4. Step 4: Simplify right side
    968.36x = 1,292,945.02
  5. Step 5: Solve for x
    x = 1,292,945.02/968.36
  6. Step 6: Final answer
    x = 1,335.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.