Home / 1,212.14-1,673.55-931.88

Finding the Fourth Proportional to 1,212.14, 1,673.55 and 931.88

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Solution

The fourth proportional to 1,212.14, 1,673.55 and 931.88 is: 1,286.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,212.14 : 1,673.55 = 931.88 : x
  2. Step 2: Convert to fraction form
    1,212.14/1,673.55 = 931.88/x
  3. Step 3: Cross multiply
    1,212.14x = 1,673.55 × 931.88
  4. Step 4: Simplify right side
    1,212.14x = 1,559,539.41
  5. Step 5: Solve for x
    x = 1,559,539.41/1,212.14
  6. Step 6: Final answer
    x = 1,286.61

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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.