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Finding the Fourth Proportional to 1,119.96, 1,678.05 and 793.71

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Solution

The fourth proportional to 1,119.96, 1,678.05 and 793.71 is: 1,189.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,119.96 : 1,678.05 = 793.71 : x
  2. Step 2: Convert to fraction form
    1,119.96/1,678.05 = 793.71/x
  3. Step 3: Cross multiply
    1,119.96x = 1,678.05 × 793.71
  4. Step 4: Simplify right side
    1,119.96x = 1,331,885.07
  5. Step 5: Solve for x
    x = 1,331,885.07/1,119.96
  6. Step 6: Final answer
    x = 1,189.23

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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.