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Finding the Fourth Proportional to 3,418.76, 5,130.56 and 1,571.96

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Solution

The fourth proportional to 3,418.76, 5,130.56 and 1,571.96 is: 2,359.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,418.76 : 5,130.56 = 1,571.96 : x
  2. Step 2: Convert to fraction form
    3,418.76/5,130.56 = 1,571.96/x
  3. Step 3: Cross multiply
    3,418.76x = 5,130.56 × 1,571.96
  4. Step 4: Simplify right side
    3,418.76x = 8,065,013.37
  5. Step 5: Solve for x
    x = 8,065,013.37/3,418.76
  6. Step 6: Final answer
    x = 2,359.05

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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.