Home / 1,270.44-1,905.72-392.90

Finding the Fourth Proportional to 1,270.44, 1,905.72 and 392.90

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Solution

The fourth proportional to 1,270.44, 1,905.72 and 392.90 is: 589.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,270.44 : 1,905.72 = 392.90 : x
  2. Step 2: Convert to fraction form
    1,270.44/1,905.72 = 392.90/x
  3. Step 3: Cross multiply
    1,270.44x = 1,905.72 × 392.90
  4. Step 4: Simplify right side
    1,270.44x = 748,757.39
  5. Step 5: Solve for x
    x = 748,757.39/1,270.44
  6. Step 6: Final answer
    x = 589.37

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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.