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Finding the Fourth Proportional to 5,146.56, 7,721.28 and 2,222.88

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Solution

The fourth proportional to 5,146.56, 7,721.28 and 2,222.88 is: 3,334.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,146.56 : 7,721.28 = 2,222.88 : x
  2. Step 2: Convert to fraction form
    5,146.56/7,721.28 = 2,222.88/x
  3. Step 3: Cross multiply
    5,146.56x = 7,721.28 × 2,222.88
  4. Step 4: Simplify right side
    5,146.56x = 17,163,478.89
  5. Step 5: Solve for x
    x = 17,163,478.89/5,146.56
  6. Step 6: Final answer
    x = 3,334.94

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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.