Home / 1,273.72-1,910.40-407.92

Finding the Fourth Proportional to 1,273.72, 1,910.40 and 407.92

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Solution

The fourth proportional to 1,273.72, 1,910.40 and 407.92 is: 611.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,273.72 : 1,910.40 = 407.92 : x
  2. Step 2: Convert to fraction form
    1,273.72/1,910.40 = 407.92/x
  3. Step 3: Cross multiply
    1,273.72x = 1,910.40 × 407.92
  4. Step 4: Simplify right side
    1,273.72x = 779,290.37
  5. Step 5: Solve for x
    x = 779,290.37/1,273.72
  6. Step 6: Final answer
    x = 611.82

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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.