Home / 2,779.74-4,171.65-1,318.89

Finding the Fourth Proportional to 2,779.74, 4,171.65 and 1,318.89

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Solution

The fourth proportional to 2,779.74, 4,171.65 and 1,318.89 is: 1,979.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,779.74 : 4,171.65 = 1,318.89 : x
  2. Step 2: Convert to fraction form
    2,779.74/4,171.65 = 1,318.89/x
  3. Step 3: Cross multiply
    2,779.74x = 4,171.65 × 1,318.89
  4. Step 4: Simplify right side
    2,779.74x = 5,501,947.47
  5. Step 5: Solve for x
    x = 5,501,947.47/2,779.74
  6. Step 6: Final answer
    x = 1,979.30

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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.