Home / 1,941.88-2,678.58-1,243.72

Finding the Fourth Proportional to 1,941.88, 2,678.58 and 1,243.72

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Solution

The fourth proportional to 1,941.88, 2,678.58 and 1,243.72 is: 1,715.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,941.88 : 2,678.58 = 1,243.72 : x
  2. Step 2: Convert to fraction form
    1,941.88/2,678.58 = 1,243.72/x
  3. Step 3: Cross multiply
    1,941.88x = 2,678.58 × 1,243.72
  4. Step 4: Simplify right side
    1,941.88x = 3,331,403.52
  5. Step 5: Solve for x
    x = 3,331,403.52/1,941.88
  6. Step 6: Final answer
    x = 1,715.56

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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.