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Finding the Fourth Proportional to 1,981.76, 2,722.56 and 1,774.64

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Solution

The fourth proportional to 1,981.76, 2,722.56 and 1,774.64 is: 2,438.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,981.76 : 2,722.56 = 1,774.64 : x
  2. Step 2: Convert to fraction form
    1,981.76/2,722.56 = 1,774.64/x
  3. Step 3: Cross multiply
    1,981.76x = 2,722.56 × 1,774.64
  4. Step 4: Simplify right side
    1,981.76x = 4,831,563.88
  5. Step 5: Solve for x
    x = 4,831,563.88/1,981.76
  6. Step 6: Final answer
    x = 2,438.02

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.