Home / 1,273.48-1,910.19-407.80

Finding the Fourth Proportional to 1,273.48, 1,910.19 and 407.80

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Solution

The fourth proportional to 1,273.48, 1,910.19 and 407.80 is: 611.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,273.48 : 1,910.19 = 407.80 : x
  2. Step 2: Convert to fraction form
    1,273.48/1,910.19 = 407.80/x
  3. Step 3: Cross multiply
    1,273.48x = 1,910.19 × 407.80
  4. Step 4: Simplify right side
    1,273.48x = 778,975.48
  5. Step 5: Solve for x
    x = 778,975.48/1,273.48
  6. Step 6: Final answer
    x = 611.69

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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.