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Finding the Fourth Proportional to 866.16, 1,297.89 and 540.54

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Solution

The fourth proportional to 866.16, 1,297.89 and 540.54 is: 809.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    866.16 : 1,297.89 = 540.54 : x
  2. Step 2: Convert to fraction form
    866.16/1,297.89 = 540.54/x
  3. Step 3: Cross multiply
    866.16x = 1,297.89 × 540.54
  4. Step 4: Simplify right side
    866.16x = 701,561.46
  5. Step 5: Solve for x
    x = 701,561.46/866.16
  6. Step 6: Final answer
    x = 809.97

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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.