Home / 1,977.68-2,969.40-1,403.60

Finding the Fourth Proportional to 1,977.68, 2,969.40 and 1,403.60

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Solution

The fourth proportional to 1,977.68, 2,969.40 and 1,403.60 is: 2,107.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,977.68 : 2,969.40 = 1,403.60 : x
  2. Step 2: Convert to fraction form
    1,977.68/2,969.40 = 1,403.60/x
  3. Step 3: Cross multiply
    1,977.68x = 2,969.40 × 1,403.60
  4. Step 4: Simplify right side
    1,977.68x = 4,167,849.84
  5. Step 5: Solve for x
    x = 4,167,849.84/1,977.68
  6. Step 6: Final answer
    x = 2,107.44

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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.