Home / 1,786.26-2,678.40-615.72

Finding the Fourth Proportional to 1,786.26, 2,678.40 and 615.72

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Solution

The fourth proportional to 1,786.26, 2,678.40 and 615.72 is: 923.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,786.26 : 2,678.40 = 615.72 : x
  2. Step 2: Convert to fraction form
    1,786.26/2,678.40 = 615.72/x
  3. Step 3: Cross multiply
    1,786.26x = 2,678.40 × 615.72
  4. Step 4: Simplify right side
    1,786.26x = 1,649,144.45
  5. Step 5: Solve for x
    x = 1,649,144.45/1,786.26
  6. Step 6: Final answer
    x = 923.24

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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.