Home / 1,977.95-2,729.25-1,315.77

Finding the Fourth Proportional to 1,977.95, 2,729.25 and 1,315.77

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Solution

The fourth proportional to 1,977.95, 2,729.25 and 1,315.77 is: 1,815.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,977.95 : 2,729.25 = 1,315.77 : x
  2. Step 2: Convert to fraction form
    1,977.95/2,729.25 = 1,315.77/x
  3. Step 3: Cross multiply
    1,977.95x = 2,729.25 × 1,315.77
  4. Step 4: Simplify right side
    1,977.95x = 3,591,065.27
  5. Step 5: Solve for x
    x = 3,591,065.27/1,977.95
  6. Step 6: Final answer
    x = 1,815.55

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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.