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Finding the Fourth Proportional to 867.94, 1,301.81 and 218.68

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Solution

The fourth proportional to 867.94, 1,301.81 and 218.68 is: 327.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    867.94 : 1,301.81 = 218.68 : x
  2. Step 2: Convert to fraction form
    867.94/1,301.81 = 218.68/x
  3. Step 3: Cross multiply
    867.94x = 1,301.81 × 218.68
  4. Step 4: Simplify right side
    867.94x = 284,675.46
  5. Step 5: Solve for x
    x = 284,675.46/867.94
  6. Step 6: Final answer
    x = 327.99

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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.