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Finding the Fourth Proportional to 891.96, 1,346.01 and 864.60

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Solution

The fourth proportional to 891.96, 1,346.01 and 864.60 is: 1,304.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    891.96 : 1,346.01 = 864.60 : x
  2. Step 2: Convert to fraction form
    891.96/1,346.01 = 864.60/x
  3. Step 3: Cross multiply
    891.96x = 1,346.01 × 864.60
  4. Step 4: Simplify right side
    891.96x = 1,163,760.25
  5. Step 5: Solve for x
    x = 1,163,760.25/891.96
  6. Step 6: Final answer
    x = 1,304.72

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.