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Finding the Fourth Proportional to 1,069.06, 1,603.63 and 338.62

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Solution

The fourth proportional to 1,069.06, 1,603.63 and 338.62 is: 507.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,069.06 : 1,603.63 = 338.62 : x
  2. Step 2: Convert to fraction form
    1,069.06/1,603.63 = 338.62/x
  3. Step 3: Cross multiply
    1,069.06x = 1,603.63 × 338.62
  4. Step 4: Simplify right side
    1,069.06x = 543,012.33
  5. Step 5: Solve for x
    x = 543,012.33/1,069.06
  6. Step 6: Final answer
    x = 507.94

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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.