Home / 1,676.86-2,505.65-1,279.36

Finding the Fourth Proportional to 1,676.86, 2,505.65 and 1,279.36

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Solution

The fourth proportional to 1,676.86, 2,505.65 and 1,279.36 is: 1,911.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,676.86 : 2,505.65 = 1,279.36 : x
  2. Step 2: Convert to fraction form
    1,676.86/2,505.65 = 1,279.36/x
  3. Step 3: Cross multiply
    1,676.86x = 2,505.65 × 1,279.36
  4. Step 4: Simplify right side
    1,676.86x = 3,205,628.38
  5. Step 5: Solve for x
    x = 3,205,628.38/1,676.86
  6. Step 6: Final answer
    x = 1,911.69

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.