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Finding the Fourth Proportional to 1,786.23, 2,678.94 and 690.03

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Solution

The fourth proportional to 1,786.23, 2,678.94 and 690.03 is: 1,034.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,786.23 : 2,678.94 = 690.03 : x
  2. Step 2: Convert to fraction form
    1,786.23/2,678.94 = 690.03/x
  3. Step 3: Cross multiply
    1,786.23x = 2,678.94 × 690.03
  4. Step 4: Simplify right side
    1,786.23x = 1,848,548.97
  5. Step 5: Solve for x
    x = 1,848,548.97/1,786.23
  6. Step 6: Final answer
    x = 1,034.89

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1.5x scale

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.