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Finding the Fourth Proportional to 1,408.93, 1,944.34 and 779.44

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Solution

The fourth proportional to 1,408.93, 1,944.34 and 779.44 is: 1,075.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,408.93 : 1,944.34 = 779.44 : x
  2. Step 2: Convert to fraction form
    1,408.93/1,944.34 = 779.44/x
  3. Step 3: Cross multiply
    1,408.93x = 1,944.34 × 779.44
  4. Step 4: Simplify right side
    1,408.93x = 1,515,498.31
  5. Step 5: Solve for x
    x = 1,515,498.31/1,408.93
  6. Step 6: Final answer
    x = 1,075.64

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1.5x scale

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.