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Finding the Fourth Proportional to 3,579.93, 5,370.80 and 1,389.33

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Solution

The fourth proportional to 3,579.93, 5,370.80 and 1,389.33 is: 2,084.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,579.93 : 5,370.80 = 1,389.33 : x
  2. Step 2: Convert to fraction form
    3,579.93/5,370.80 = 1,389.33/x
  3. Step 3: Cross multiply
    3,579.93x = 5,370.80 × 1,389.33
  4. Step 4: Simplify right side
    3,579.93x = 7,461,806.62
  5. Step 5: Solve for x
    x = 7,461,806.62/3,579.93
  6. Step 6: Final answer
    x = 2,084.34

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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.