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Finding the Fourth Proportional to 2,900.75, 4,004.06 and 1,721.81

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Solution

The fourth proportional to 2,900.75, 4,004.06 and 1,721.81 is: 2,376.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,900.75 : 4,004.06 = 1,721.81 : x
  2. Step 2: Convert to fraction form
    2,900.75/4,004.06 = 1,721.81/x
  3. Step 3: Cross multiply
    2,900.75x = 4,004.06 × 1,721.81
  4. Step 4: Simplify right side
    2,900.75x = 6,894,241.63
  5. Step 5: Solve for x
    x = 6,894,241.63/2,900.75
  6. Step 6: Final answer
    x = 2,376.71

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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.