Home / 1,282.26-1,768.64-1,239.40

Finding the Fourth Proportional to 1,282.26, 1,768.64 and 1,239.40

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Solution

The fourth proportional to 1,282.26, 1,768.64 and 1,239.40 is: 1,709.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,282.26 : 1,768.64 = 1,239.40 : x
  2. Step 2: Convert to fraction form
    1,282.26/1,768.64 = 1,239.40/x
  3. Step 3: Cross multiply
    1,282.26x = 1,768.64 × 1,239.40
  4. Step 4: Simplify right side
    1,282.26x = 2,192,052.42
  5. Step 5: Solve for x
    x = 2,192,052.42/1,282.26
  6. Step 6: Final answer
    x = 1,709.52

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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.