Home / 1,975.69-2,725.60-1,386.61

Finding the Fourth Proportional to 1,975.69, 2,725.60 and 1,386.61

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Solution

The fourth proportional to 1,975.69, 2,725.60 and 1,386.61 is: 1,912.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,975.69 : 2,725.60 = 1,386.61 : x
  2. Step 2: Convert to fraction form
    1,975.69/2,725.60 = 1,386.61/x
  3. Step 3: Cross multiply
    1,975.69x = 2,725.60 × 1,386.61
  4. Step 4: Simplify right side
    1,975.69x = 3,779,344.22
  5. Step 5: Solve for x
    x = 3,779,344.22/1,975.69
  6. Step 6: Final answer
    x = 1,912.92

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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.