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Finding the Fourth Proportional to 1,786.26, 2,677.77 and 918.75

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Solution

The fourth proportional to 1,786.26, 2,677.77 and 918.75 is: 1,377.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,786.26 : 2,677.77 = 918.75 : x
  2. Step 2: Convert to fraction form
    1,786.26/2,677.77 = 918.75/x
  3. Step 3: Cross multiply
    1,786.26x = 2,677.77 × 918.75
  4. Step 4: Simplify right side
    1,786.26x = 2,460,201.19
  5. Step 5: Solve for x
    x = 2,460,201.19/1,786.26
  6. Step 6: Final answer
    x = 1,377.29

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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.