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Finding the Fourth Proportional to 3,312.88, 4,955.64 and 2,721.22

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Solution

The fourth proportional to 3,312.88, 4,955.64 and 2,721.22 is: 4,070.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,312.88 : 4,955.64 = 2,721.22 : x
  2. Step 2: Convert to fraction form
    3,312.88/4,955.64 = 2,721.22/x
  3. Step 3: Cross multiply
    3,312.88x = 4,955.64 × 2,721.22
  4. Step 4: Simplify right side
    3,312.88x = 13,485,386.68
  5. Step 5: Solve for x
    x = 13,485,386.68/3,312.88
  6. Step 6: Final answer
    x = 4,070.59

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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.