Home / 1,412.12-2,115.44-923.68

Finding the Fourth Proportional to 1,412.12, 2,115.44 and 923.68

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Solution

The fourth proportional to 1,412.12, 2,115.44 and 923.68 is: 1,383.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,412.12 : 2,115.44 = 923.68 : x
  2. Step 2: Convert to fraction form
    1,412.12/2,115.44 = 923.68/x
  3. Step 3: Cross multiply
    1,412.12x = 2,115.44 × 923.68
  4. Step 4: Simplify right side
    1,412.12x = 1,953,989.62
  5. Step 5: Solve for x
    x = 1,953,989.62/1,412.12
  6. Step 6: Final answer
    x = 1,383.73

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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.