Home / 1,786.07-2,678.96-487.64

Finding the Fourth Proportional to 1,786.07, 2,678.96 and 487.64

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Solution

The fourth proportional to 1,786.07, 2,678.96 and 487.64 is: 731.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,786.07 : 2,678.96 = 487.64 : x
  2. Step 2: Convert to fraction form
    1,786.07/2,678.96 = 487.64/x
  3. Step 3: Cross multiply
    1,786.07x = 2,678.96 × 487.64
  4. Step 4: Simplify right side
    1,786.07x = 1,306,354.66
  5. Step 5: Solve for x
    x = 1,306,354.66/1,786.07
  6. Step 6: Final answer
    x = 731.41

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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.