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Finding the Fourth Proportional to 1,193.15, 1,788.69 and 776.81

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Solution

The fourth proportional to 1,193.15, 1,788.69 and 776.81 is: 1,164.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,193.15 : 1,788.69 = 776.81 : x
  2. Step 2: Convert to fraction form
    1,193.15/1,788.69 = 776.81/x
  3. Step 3: Cross multiply
    1,193.15x = 1,788.69 × 776.81
  4. Step 4: Simplify right side
    1,193.15x = 1,389,472.28
  5. Step 5: Solve for x
    x = 1,389,472.28/1,193.15
  6. Step 6: Final answer
    x = 1,164.54

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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.