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Finding the Fourth Proportional to 679.89, 1,020.03 and 192.95

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Solution

The fourth proportional to 679.89, 1,020.03 and 192.95 is: 289.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.89 : 1,020.03 = 192.95 : x
  2. Step 2: Convert to fraction form
    679.89/1,020.03 = 192.95/x
  3. Step 3: Cross multiply
    679.89x = 1,020.03 × 192.95
  4. Step 4: Simplify right side
    679.89x = 196,808.72
  5. Step 5: Solve for x
    x = 196,808.72/679.89
  6. Step 6: Final answer
    x = 289.47

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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.