Home / 3,910.89-5,866.34-1,315.65

Finding the Fourth Proportional to 3,910.89, 5,866.34 and 1,315.65

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Solution

The fourth proportional to 3,910.89, 5,866.34 and 1,315.65 is: 1,973.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,910.89 : 5,866.34 = 1,315.65 : x
  2. Step 2: Convert to fraction form
    3,910.89/5,866.34 = 1,315.65/x
  3. Step 3: Cross multiply
    3,910.89x = 5,866.34 × 1,315.65
  4. Step 4: Simplify right side
    3,910.89x = 7,718,050.22
  5. Step 5: Solve for x
    x = 7,718,050.22/3,910.89
  6. Step 6: Final answer
    x = 1,973.48

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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.