Home / 1,905.31-2,855.26-1,125.48

Finding the Fourth Proportional to 1,905.31, 2,855.26 and 1,125.48

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Solution

The fourth proportional to 1,905.31, 2,855.26 and 1,125.48 is: 1,686.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,905.31 : 2,855.26 = 1,125.48 : x
  2. Step 2: Convert to fraction form
    1,905.31/2,855.26 = 1,125.48/x
  3. Step 3: Cross multiply
    1,905.31x = 2,855.26 × 1,125.48
  4. Step 4: Simplify right side
    1,905.31x = 3,213,538.02
  5. Step 5: Solve for x
    x = 3,213,538.02/1,905.31
  6. Step 6: Final answer
    x = 1,686.62

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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.