Home / 1,977.38-2,728.58-1,138.02

Finding the Fourth Proportional to 1,977.38, 2,728.58 and 1,138.02

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Solution

The fourth proportional to 1,977.38, 2,728.58 and 1,138.02 is: 1,570.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,977.38 : 2,728.58 = 1,138.02 : x
  2. Step 2: Convert to fraction form
    1,977.38/2,728.58 = 1,138.02/x
  3. Step 3: Cross multiply
    1,977.38x = 2,728.58 × 1,138.02
  4. Step 4: Simplify right side
    1,977.38x = 3,105,172.92
  5. Step 5: Solve for x
    x = 3,105,172.92/1,977.38
  6. Step 6: Final answer
    x = 1,570.35

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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.