Home / 2,830.21-3,905.70-1,571.28

Finding the Fourth Proportional to 2,830.21, 3,905.70 and 1,571.28

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Solution

The fourth proportional to 2,830.21, 3,905.70 and 1,571.28 is: 2,168.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,830.21 : 3,905.70 = 1,571.28 : x
  2. Step 2: Convert to fraction form
    2,830.21/3,905.70 = 1,571.28/x
  3. Step 3: Cross multiply
    2,830.21x = 3,905.70 × 1,571.28
  4. Step 4: Simplify right side
    2,830.21x = 6,136,948.30
  5. Step 5: Solve for x
    x = 6,136,948.30/2,830.21
  6. Step 6: Final answer
    x = 2,168.37

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.