Home / 1,412.40-2,112.60-1,267.20

Finding the Fourth Proportional to 1,412.40, 2,112.60 and 1,267.20

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Solution

The fourth proportional to 1,412.40, 2,112.60 and 1,267.20 is: 1,895.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,412.40 : 2,112.60 = 1,267.20 : x
  2. Step 2: Convert to fraction form
    1,412.40/2,112.60 = 1,267.20/x
  3. Step 3: Cross multiply
    1,412.40x = 2,112.60 × 1,267.20
  4. Step 4: Simplify right side
    1,412.40x = 2,677,086.72
  5. Step 5: Solve for x
    x = 2,677,086.72/1,412.40
  6. Step 6: Final answer
    x = 1,895.42

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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.