Home / 1,239.48-1,721.67-1,219.62

Finding the Fourth Proportional to 1,239.48, 1,721.67 and 1,219.62

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Solution

The fourth proportional to 1,239.48, 1,721.67 and 1,219.62 is: 1,694.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,239.48 : 1,721.67 = 1,219.62 : x
  2. Step 2: Convert to fraction form
    1,239.48/1,721.67 = 1,219.62/x
  3. Step 3: Cross multiply
    1,239.48x = 1,721.67 × 1,219.62
  4. Step 4: Simplify right side
    1,239.48x = 2,099,783.17
  5. Step 5: Solve for x
    x = 2,099,783.17/1,239.48
  6. Step 6: Final answer
    x = 1,694.08

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.