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Finding the Fourth Proportional to 3,220.88, 4,787.88 and 3,126.29

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Solution

The fourth proportional to 3,220.88, 4,787.88 and 3,126.29 is: 4,647.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,220.88 : 4,787.88 = 3,126.29 : x
  2. Step 2: Convert to fraction form
    3,220.88/4,787.88 = 3,126.29/x
  3. Step 3: Cross multiply
    3,220.88x = 4,787.88 × 3,126.29
  4. Step 4: Simplify right side
    3,220.88x = 14,968,277.43
  5. Step 5: Solve for x
    x = 14,968,277.43/3,220.88
  6. Step 6: Final answer
    x = 4,647.27

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1.5x scale

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.