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Finding the Fourth Proportional to 1,379.88, 2,058.64 and 1,267

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Solution

The fourth proportional to 1,379.88, 2,058.64 and 1,267 is: 1,890.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,379.88 : 2,058.64 = 1,267 : x
  2. Step 2: Convert to fraction form
    1,379.88/2,058.64 = 1,267/x
  3. Step 3: Cross multiply
    1,379.88x = 2,058.64 × 1,267
  4. Step 4: Simplify right side
    1,379.88x = 2,608,296.88
  5. Step 5: Solve for x
    x = 2,608,296.88/1,379.88
  6. Step 6: Final answer
    x = 1,890.23

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.