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Finding the Fourth Proportional to 2,811.76, 3,880.22 and 1,569.76

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Solution

The fourth proportional to 2,811.76, 3,880.22 and 1,569.76 is: 2,166.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811.76 : 3,880.22 = 1,569.76 : x
  2. Step 2: Convert to fraction form
    2,811.76/3,880.22 = 1,569.76/x
  3. Step 3: Cross multiply
    2,811.76x = 3,880.22 × 1,569.76
  4. Step 4: Simplify right side
    2,811.76x = 6,091,014.15
  5. Step 5: Solve for x
    x = 6,091,014.15/2,811.76
  6. Step 6: Final answer
    x = 2,166.26

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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.