Home / 3,215.75-4,822.90-1,571.51

Finding the Fourth Proportional to 3,215.75, 4,822.90 and 1,571.51

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Solution

The fourth proportional to 3,215.75, 4,822.90 and 1,571.51 is: 2,356.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,215.75 : 4,822.90 = 1,571.51 : x
  2. Step 2: Convert to fraction form
    3,215.75/4,822.90 = 1,571.51/x
  3. Step 3: Cross multiply
    3,215.75x = 4,822.90 × 1,571.51
  4. Step 4: Simplify right side
    3,215.75x = 7,579,235.58
  5. Step 5: Solve for x
    x = 7,579,235.58/3,215.75
  6. Step 6: Final answer
    x = 2,356.91

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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.