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Finding the Fourth Proportional to 1,774.40, 2,661.77 and 679.68

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Solution

The fourth proportional to 1,774.40, 2,661.77 and 679.68 is: 1,019.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,774.40 : 2,661.77 = 679.68 : x
  2. Step 2: Convert to fraction form
    1,774.40/2,661.77 = 679.68/x
  3. Step 3: Cross multiply
    1,774.40x = 2,661.77 × 679.68
  4. Step 4: Simplify right side
    1,774.40x = 1,809,151.83
  5. Step 5: Solve for x
    x = 1,809,151.83/1,774.40
  6. Step 6: Final answer
    x = 1,019.59

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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.