Home / 1,977.49-2,729.51-1,138.79

Finding the Fourth Proportional to 1,977.49, 2,729.51 and 1,138.79

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Solution

The fourth proportional to 1,977.49, 2,729.51 and 1,138.79 is: 1,571.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,977.49 : 2,729.51 = 1,138.79 : x
  2. Step 2: Convert to fraction form
    1,977.49/2,729.51 = 1,138.79/x
  3. Step 3: Cross multiply
    1,977.49x = 2,729.51 × 1,138.79
  4. Step 4: Simplify right side
    1,977.49x = 3,108,319.35
  5. Step 5: Solve for x
    x = 3,108,319.35/1,977.49
  6. Step 6: Final answer
    x = 1,571.85

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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.