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Finding the Fourth Proportional to 1,907.91, 2,855.79 and 1,645.47

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Solution

The fourth proportional to 1,907.91, 2,855.79 and 1,645.47 is: 2,462.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,907.91 : 2,855.79 = 1,645.47 : x
  2. Step 2: Convert to fraction form
    1,907.91/2,855.79 = 1,645.47/x
  3. Step 3: Cross multiply
    1,907.91x = 2,855.79 × 1,645.47
  4. Step 4: Simplify right side
    1,907.91x = 4,699,116.77
  5. Step 5: Solve for x
    x = 4,699,116.77/1,907.91
  6. Step 6: Final answer
    x = 2,462.97

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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.