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Finding the Fourth Proportional to 1,069.26, 1,603.86 and 338.82

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Solution

The fourth proportional to 1,069.26, 1,603.86 and 338.82 is: 508.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,069.26 : 1,603.86 = 338.82 : x
  2. Step 2: Convert to fraction form
    1,069.26/1,603.86 = 338.82/x
  3. Step 3: Cross multiply
    1,069.26x = 1,603.86 × 338.82
  4. Step 4: Simplify right side
    1,069.26x = 543,419.85
  5. Step 5: Solve for x
    x = 543,419.85/1,069.26
  6. Step 6: Final answer
    x = 508.22

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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.