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Finding the Fourth Proportional to 3,369.87, 5,054.81 and 1,421.01

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Solution

The fourth proportional to 3,369.87, 5,054.81 and 1,421.01 is: 2,131.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,369.87 : 5,054.81 = 1,421.01 : x
  2. Step 2: Convert to fraction form
    3,369.87/5,054.81 = 1,421.01/x
  3. Step 3: Cross multiply
    3,369.87x = 5,054.81 × 1,421.01
  4. Step 4: Simplify right side
    3,369.87x = 7,182,928.45
  5. Step 5: Solve for x
    x = 7,182,928.45/3,369.87
  6. Step 6: Final answer
    x = 2,131.52

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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.