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Finding the Fourth Proportional to 1,412.00, 2,119.43 and 682.19

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Solution

The fourth proportional to 1,412.00, 2,119.43 and 682.19 is: 1,023.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,412.00 : 2,119.43 = 682.19 : x
  2. Step 2: Convert to fraction form
    1,412.00/2,119.43 = 682.19/x
  3. Step 3: Cross multiply
    1,412.00x = 2,119.43 × 682.19
  4. Step 4: Simplify right side
    1,412.00x = 1,445,853.01
  5. Step 5: Solve for x
    x = 1,445,853.01/1,412.00
  6. Step 6: Final answer
    x = 1,023.98

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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.