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Finding the Fourth Proportional to 2,275, 3,386.45 and 2,168.80

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Solution

The fourth proportional to 2,275, 3,386.45 and 2,168.80 is: 3,228.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,275 : 3,386.45 = 2,168.80 : x
  2. Step 2: Convert to fraction form
    2,275/3,386.45 = 2,168.80/x
  3. Step 3: Cross multiply
    2,275x = 3,386.45 × 2,168.80
  4. Step 4: Simplify right side
    2,275x = 7,344,532.76
  5. Step 5: Solve for x
    x = 7,344,532.76/2,275
  6. Step 6: Final answer
    x = 3,228.37

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.