Home / 1,905.69-2,628.90-1,643.25

Finding the Fourth Proportional to 1,905.69, 2,628.90 and 1,643.25

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Solution

The fourth proportional to 1,905.69, 2,628.90 and 1,643.25 is: 2,266.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,905.69 : 2,628.90 = 1,643.25 : x
  2. Step 2: Convert to fraction form
    1,905.69/2,628.90 = 1,643.25/x
  3. Step 3: Cross multiply
    1,905.69x = 2,628.90 × 1,643.25
  4. Step 4: Simplify right side
    1,905.69x = 4,319,939.93
  5. Step 5: Solve for x
    x = 4,319,939.93/1,905.69
  6. Step 6: Final answer
    x = 2,266.86

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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.