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Finding the Fourth Proportional to 1,360.76, 2,041 and 386.60

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Solution

The fourth proportional to 1,360.76, 2,041 and 386.60 is: 579.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,360.76 : 2,041 = 386.60 : x
  2. Step 2: Convert to fraction form
    1,360.76/2,041 = 386.60/x
  3. Step 3: Cross multiply
    1,360.76x = 2,041 × 386.60
  4. Step 4: Simplify right side
    1,360.76x = 789,050.60
  5. Step 5: Solve for x
    x = 789,050.60/1,360.76
  6. Step 6: Final answer
    x = 579.86

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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.