Home / 1,977.21-2,960.15-1,326.78

Finding the Fourth Proportional to 1,977.21, 2,960.15 and 1,326.78

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Solution

The fourth proportional to 1,977.21, 2,960.15 and 1,326.78 is: 1,986.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,977.21 : 2,960.15 = 1,326.78 : x
  2. Step 2: Convert to fraction form
    1,977.21/2,960.15 = 1,326.78/x
  3. Step 3: Cross multiply
    1,977.21x = 2,960.15 × 1,326.78
  4. Step 4: Simplify right side
    1,977.21x = 3,927,461.18
  5. Step 5: Solve for x
    x = 3,927,461.18/1,977.21
  6. Step 6: Final answer
    x = 1,986.37

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.