Home / 1,228.23-1,842.75-407.09

Finding the Fourth Proportional to 1,228.23, 1,842.75 and 407.09

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Solution

The fourth proportional to 1,228.23, 1,842.75 and 407.09 is: 610.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,228.23 : 1,842.75 = 407.09 : x
  2. Step 2: Convert to fraction form
    1,228.23/1,842.75 = 407.09/x
  3. Step 3: Cross multiply
    1,228.23x = 1,842.75 × 407.09
  4. Step 4: Simplify right side
    1,228.23x = 750,169.70
  5. Step 5: Solve for x
    x = 750,169.70/1,228.23
  6. Step 6: Final answer
    x = 610.77

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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.