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Finding the Fourth Proportional to 1,369.02, 1,889.34 and 779.52

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Solution

The fourth proportional to 1,369.02, 1,889.34 and 779.52 is: 1,075.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,369.02 : 1,889.34 = 779.52 : x
  2. Step 2: Convert to fraction form
    1,369.02/1,889.34 = 779.52/x
  3. Step 3: Cross multiply
    1,369.02x = 1,889.34 × 779.52
  4. Step 4: Simplify right side
    1,369.02x = 1,472,778.32
  5. Step 5: Solve for x
    x = 1,472,778.32/1,369.02
  6. Step 6: Final answer
    x = 1,075.79

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.