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Finding the Fourth Proportional to 2,174.81, 3,001.21 and 1,230.57

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Solution

The fourth proportional to 2,174.81, 3,001.21 and 1,230.57 is: 1,698.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,174.81 : 3,001.21 = 1,230.57 : x
  2. Step 2: Convert to fraction form
    2,174.81/3,001.21 = 1,230.57/x
  3. Step 3: Cross multiply
    2,174.81x = 3,001.21 × 1,230.57
  4. Step 4: Simplify right side
    2,174.81x = 3,693,195.91
  5. Step 5: Solve for x
    x = 3,693,195.91/2,174.81
  6. Step 6: Final answer
    x = 1,698.17

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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.