Home / 1,289.53-1,932.62-519.61

Finding the Fourth Proportional to 1,289.53, 1,932.62 and 519.61

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Solution

The fourth proportional to 1,289.53, 1,932.62 and 519.61 is: 778.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289.53 : 1,932.62 = 519.61 : x
  2. Step 2: Convert to fraction form
    1,289.53/1,932.62 = 519.61/x
  3. Step 3: Cross multiply
    1,289.53x = 1,932.62 × 519.61
  4. Step 4: Simplify right side
    1,289.53x = 1,004,206.08
  5. Step 5: Solve for x
    x = 1,004,206.08/1,289.53
  6. Step 6: Final answer
    x = 778.74

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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.