Home / 5,238.54-7,857.68-1,289.79

Finding the Fourth Proportional to 5,238.54, 7,857.68 and 1,289.79

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Solution

The fourth proportional to 5,238.54, 7,857.68 and 1,289.79 is: 1,934.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,238.54 : 7,857.68 = 1,289.79 : x
  2. Step 2: Convert to fraction form
    5,238.54/7,857.68 = 1,289.79/x
  3. Step 3: Cross multiply
    5,238.54x = 7,857.68 × 1,289.79
  4. Step 4: Simplify right side
    5,238.54x = 10,134,750.64
  5. Step 5: Solve for x
    x = 10,134,750.64/5,238.54
  6. Step 6: Final answer
    x = 1,934.65

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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.