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Finding the Fourth Proportional to 1,200.08, 1,800.06 and 378.26

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Solution

The fourth proportional to 1,200.08, 1,800.06 and 378.26 is: 567.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,200.08 : 1,800.06 = 378.26 : x
  2. Step 2: Convert to fraction form
    1,200.08/1,800.06 = 378.26/x
  3. Step 3: Cross multiply
    1,200.08x = 1,800.06 × 378.26
  4. Step 4: Simplify right side
    1,200.08x = 680,890.70
  5. Step 5: Solve for x
    x = 680,890.70/1,200.08
  6. Step 6: Final answer
    x = 567.37

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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.