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Finding the Fourth Proportional to 3,938.54, 5,907.80 and 2,702.20

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Solution

The fourth proportional to 3,938.54, 5,907.80 and 2,702.20 is: 4,053.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,938.54 : 5,907.80 = 2,702.20 : x
  2. Step 2: Convert to fraction form
    3,938.54/5,907.80 = 2,702.20/x
  3. Step 3: Cross multiply
    3,938.54x = 5,907.80 × 2,702.20
  4. Step 4: Simplify right side
    3,938.54x = 15,964,057.16
  5. Step 5: Solve for x
    x = 15,964,057.16/3,938.54
  6. Step 6: Final answer
    x = 4,053.29

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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.