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Finding the Fourth Proportional to 1,930.33, 2,895.50 and 775.81

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Solution

The fourth proportional to 1,930.33, 2,895.50 and 775.81 is: 1,163.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,930.33 : 2,895.50 = 775.81 : x
  2. Step 2: Convert to fraction form
    1,930.33/2,895.50 = 775.81/x
  3. Step 3: Cross multiply
    1,930.33x = 2,895.50 × 775.81
  4. Step 4: Simplify right side
    1,930.33x = 2,246,364.12
  5. Step 5: Solve for x
    x = 2,246,364.12/1,930.33
  6. Step 6: Final answer
    x = 1,163.72

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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.