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Finding the Fourth Proportional to 4,159.90, 6,239.44 and 1,081.90

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Solution

The fourth proportional to 4,159.90, 6,239.44 and 1,081.90 is: 1,622.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,159.90 : 6,239.44 = 1,081.90 : x
  2. Step 2: Convert to fraction form
    4,159.90/6,239.44 = 1,081.90/x
  3. Step 3: Cross multiply
    4,159.90x = 6,239.44 × 1,081.90
  4. Step 4: Simplify right side
    4,159.90x = 6,750,450.14
  5. Step 5: Solve for x
    x = 6,750,450.14/4,159.90
  6. Step 6: Final answer
    x = 1,622.74

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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.