Home / 1,679.40-2,317.37-933.12

Finding the Fourth Proportional to 1,679.40, 2,317.37 and 933.12

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Solution

The fourth proportional to 1,679.40, 2,317.37 and 933.12 is: 1,287.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,679.40 : 2,317.37 = 933.12 : x
  2. Step 2: Convert to fraction form
    1,679.40/2,317.37 = 933.12/x
  3. Step 3: Cross multiply
    1,679.40x = 2,317.37 × 933.12
  4. Step 4: Simplify right side
    1,679.40x = 2,162,379.63
  5. Step 5: Solve for x
    x = 2,162,379.63/1,679.40
  6. Step 6: Final answer
    x = 1,287.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.