Home / 1,679.42-2,318.57-1,121.74

Finding the Fourth Proportional to 1,679.42, 2,318.57 and 1,121.74

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Solution

The fourth proportional to 1,679.42, 2,318.57 and 1,121.74 is: 1,548.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,679.42 : 2,318.57 = 1,121.74 : x
  2. Step 2: Convert to fraction form
    1,679.42/2,318.57 = 1,121.74/x
  3. Step 3: Cross multiply
    1,679.42x = 2,318.57 × 1,121.74
  4. Step 4: Simplify right side
    1,679.42x = 2,600,829.72
  5. Step 5: Solve for x
    x = 2,600,829.72/1,679.42
  6. Step 6: Final answer
    x = 1,548.65

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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.