Home / 1,270.45-1,905.84-480.06

Finding the Fourth Proportional to 1,270.45, 1,905.84 and 480.06

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Solution

The fourth proportional to 1,270.45, 1,905.84 and 480.06 is: 720.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,270.45 : 1,905.84 = 480.06 : x
  2. Step 2: Convert to fraction form
    1,270.45/1,905.84 = 480.06/x
  3. Step 3: Cross multiply
    1,270.45x = 1,905.84 × 480.06
  4. Step 4: Simplify right side
    1,270.45x = 914,905.62
  5. Step 5: Solve for x
    x = 914,905.62/1,270.45
  6. Step 6: Final answer
    x = 720.15

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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.