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Finding the Fourth Proportional to 712.69, 1,068.90 and 192.73

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Solution

The fourth proportional to 712.69, 1,068.90 and 192.73 is: 289.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    712.69 : 1,068.90 = 192.73 : x
  2. Step 2: Convert to fraction form
    712.69/1,068.90 = 192.73/x
  3. Step 3: Cross multiply
    712.69x = 1,068.90 × 192.73
  4. Step 4: Simplify right side
    712.69x = 206,009.10
  5. Step 5: Solve for x
    x = 206,009.10/712.69
  6. Step 6: Final answer
    x = 289.06

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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.