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Finding the Fourth Proportional to 1,782.23, 2,674.23 and 858.57

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Solution

The fourth proportional to 1,782.23, 2,674.23 and 858.57 is: 1,288.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,782.23 : 2,674.23 = 858.57 : x
  2. Step 2: Convert to fraction form
    1,782.23/2,674.23 = 858.57/x
  3. Step 3: Cross multiply
    1,782.23x = 2,674.23 × 858.57
  4. Step 4: Simplify right side
    1,782.23x = 2,296,013.65
  5. Step 5: Solve for x
    x = 2,296,013.65/1,782.23
  6. Step 6: Final answer
    x = 1,288.28

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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.