Home / 1,977.61-2,729.09-1,138.48

Finding the Fourth Proportional to 1,977.61, 2,729.09 and 1,138.48

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Solution

The fourth proportional to 1,977.61, 2,729.09 and 1,138.48 is: 1,571.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,977.61 : 2,729.09 = 1,138.48 : x
  2. Step 2: Convert to fraction form
    1,977.61/2,729.09 = 1,138.48/x
  3. Step 3: Cross multiply
    1,977.61x = 2,729.09 × 1,138.48
  4. Step 4: Simplify right side
    1,977.61x = 3,107,014.38
  5. Step 5: Solve for x
    x = 3,107,014.38/1,977.61
  6. Step 6: Final answer
    x = 1,571.10

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1.5x scale

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.