Home / 1,273.36-1,910.08-407.64

Finding the Fourth Proportional to 1,273.36, 1,910.08 and 407.64

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Solution

The fourth proportional to 1,273.36, 1,910.08 and 407.64 is: 611.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,273.36 : 1,910.08 = 407.64 : x
  2. Step 2: Convert to fraction form
    1,273.36/1,910.08 = 407.64/x
  3. Step 3: Cross multiply
    1,273.36x = 1,910.08 × 407.64
  4. Step 4: Simplify right side
    1,273.36x = 778,625.01
  5. Step 5: Solve for x
    x = 778,625.01/1,273.36
  6. Step 6: Final answer
    x = 611.47

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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.