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Finding the Fourth Proportional to 2,802.88, 3,872.88 and 2,305.12

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Solution

The fourth proportional to 2,802.88, 3,872.88 and 2,305.12 is: 3,185.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,802.88 : 3,872.88 = 2,305.12 : x
  2. Step 2: Convert to fraction form
    2,802.88/3,872.88 = 2,305.12/x
  3. Step 3: Cross multiply
    2,802.88x = 3,872.88 × 2,305.12
  4. Step 4: Simplify right side
    2,802.88x = 8,927,453.15
  5. Step 5: Solve for x
    x = 8,927,453.15/2,802.88
  6. Step 6: Final answer
    x = 3,185.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.