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Finding the Fourth Proportional to 1,977.26, 2,728.43 and 1,230.64

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Solution

The fourth proportional to 1,977.26, 2,728.43 and 1,230.64 is: 1,698.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,977.26 : 2,728.43 = 1,230.64 : x
  2. Step 2: Convert to fraction form
    1,977.26/2,728.43 = 1,230.64/x
  3. Step 3: Cross multiply
    1,977.26x = 2,728.43 × 1,230.64
  4. Step 4: Simplify right side
    1,977.26x = 3,357,729.01
  5. Step 5: Solve for x
    x = 3,357,729.01/1,977.26
  6. Step 6: Final answer
    x = 1,698.17

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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.