Home / 1,977.32-2,728.91-1,138.06

Finding the Fourth Proportional to 1,977.32, 2,728.91 and 1,138.06

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Solution

The fourth proportional to 1,977.32, 2,728.91 and 1,138.06 is: 1,570.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,977.32 : 2,728.91 = 1,138.06 : x
  2. Step 2: Convert to fraction form
    1,977.32/2,728.91 = 1,138.06/x
  3. Step 3: Cross multiply
    1,977.32x = 2,728.91 × 1,138.06
  4. Step 4: Simplify right side
    1,977.32x = 3,105,643.98
  5. Step 5: Solve for x
    x = 3,105,643.98/1,977.32
  6. Step 6: Final answer
    x = 1,570.63

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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.