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Finding the Fourth Proportional to 1,289.45, 1,933.71 and 796.12

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Solution

The fourth proportional to 1,289.45, 1,933.71 and 796.12 is: 1,193.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289.45 : 1,933.71 = 796.12 : x
  2. Step 2: Convert to fraction form
    1,289.45/1,933.71 = 796.12/x
  3. Step 3: Cross multiply
    1,289.45x = 1,933.71 × 796.12
  4. Step 4: Simplify right side
    1,289.45x = 1,539,465.21
  5. Step 5: Solve for x
    x = 1,539,465.21/1,289.45
  6. Step 6: Final answer
    x = 1,193.89

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1.5x scale

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.