Home / 1,979.65-2,731.80-1,095.40

Finding the Fourth Proportional to 1,979.65, 2,731.80 and 1,095.40

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Solution

The fourth proportional to 1,979.65, 2,731.80 and 1,095.40 is: 1,511.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,979.65 : 2,731.80 = 1,095.40 : x
  2. Step 2: Convert to fraction form
    1,979.65/2,731.80 = 1,095.40/x
  3. Step 3: Cross multiply
    1,979.65x = 2,731.80 × 1,095.40
  4. Step 4: Simplify right side
    1,979.65x = 2,992,413.72
  5. Step 5: Solve for x
    x = 2,992,413.72/1,979.65
  6. Step 6: Final answer
    x = 1,511.59

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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.