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Finding the Fourth Proportional to 679.09, 1,018.73 and 192.13

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Solution

The fourth proportional to 679.09, 1,018.73 and 192.13 is: 288.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.09 : 1,018.73 = 192.13 : x
  2. Step 2: Convert to fraction form
    679.09/1,018.73 = 192.13/x
  3. Step 3: Cross multiply
    679.09x = 1,018.73 × 192.13
  4. Step 4: Simplify right side
    679.09x = 195,727.63
  5. Step 5: Solve for x
    x = 195,727.63/679.09
  6. Step 6: Final answer
    x = 288.22

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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.