Home / 1,905.51-2,855.32-1,321.66

Finding the Fourth Proportional to 1,905.51, 2,855.32 and 1,321.66

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Solution

The fourth proportional to 1,905.51, 2,855.32 and 1,321.66 is: 1,980.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,905.51 : 2,855.32 = 1,321.66 : x
  2. Step 2: Convert to fraction form
    1,905.51/2,855.32 = 1,321.66/x
  3. Step 3: Cross multiply
    1,905.51x = 2,855.32 × 1,321.66
  4. Step 4: Simplify right side
    1,905.51x = 3,773,747.95
  5. Step 5: Solve for x
    x = 3,773,747.95/1,905.51
  6. Step 6: Final answer
    x = 1,980.44

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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.