Home / 1,679.18-2,317.26-933.20

Finding the Fourth Proportional to 1,679.18, 2,317.26 and 933.20

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Solution

The fourth proportional to 1,679.18, 2,317.26 and 933.20 is: 1,287.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,679.18 : 2,317.26 = 933.20 : x
  2. Step 2: Convert to fraction form
    1,679.18/2,317.26 = 933.20/x
  3. Step 3: Cross multiply
    1,679.18x = 2,317.26 × 933.20
  4. Step 4: Simplify right side
    1,679.18x = 2,162,480.67
  5. Step 5: Solve for x
    x = 2,162,480.67/1,679.18
  6. Step 6: Final answer
    x = 1,287.82

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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.