Home / 1,977.31-2,729.19-1,230.76

Finding the Fourth Proportional to 1,977.31, 2,729.19 and 1,230.76

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Solution

The fourth proportional to 1,977.31, 2,729.19 and 1,230.76 is: 1,698.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,977.31 : 2,729.19 = 1,230.76 : x
  2. Step 2: Convert to fraction form
    1,977.31/2,729.19 = 1,230.76/x
  3. Step 3: Cross multiply
    1,977.31x = 2,729.19 × 1,230.76
  4. Step 4: Simplify right side
    1,977.31x = 3,358,977.88
  5. Step 5: Solve for x
    x = 3,358,977.88/1,977.31
  6. Step 6: Final answer
    x = 1,698.76

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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.