Home / 1,219.14-1,828.47-439.12

Finding the Fourth Proportional to 1,219.14, 1,828.47 and 439.12

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Solution

The fourth proportional to 1,219.14, 1,828.47 and 439.12 is: 658.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,219.14 : 1,828.47 = 439.12 : x
  2. Step 2: Convert to fraction form
    1,219.14/1,828.47 = 439.12/x
  3. Step 3: Cross multiply
    1,219.14x = 1,828.47 × 439.12
  4. Step 4: Simplify right side
    1,219.14x = 802,917.75
  5. Step 5: Solve for x
    x = 802,917.75/1,219.14
  6. Step 6: Final answer
    x = 658.59

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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.