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Finding the Fourth Proportional to 1,907.78, 2,855.91 and 1,725.26

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Solution

The fourth proportional to 1,907.78, 2,855.91 and 1,725.26 is: 2,582.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,907.78 : 2,855.91 = 1,725.26 : x
  2. Step 2: Convert to fraction form
    1,907.78/2,855.91 = 1,725.26/x
  3. Step 3: Cross multiply
    1,907.78x = 2,855.91 × 1,725.26
  4. Step 4: Simplify right side
    1,907.78x = 4,927,187.29
  5. Step 5: Solve for x
    x = 4,927,187.29/1,907.78
  6. Step 6: Final answer
    x = 2,582.68

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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.