Home / 1,270.36-1,905.72-392.94

Finding the Fourth Proportional to 1,270.36, 1,905.72 and 392.94

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Solution

The fourth proportional to 1,270.36, 1,905.72 and 392.94 is: 589.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,270.36 : 1,905.72 = 392.94 : x
  2. Step 2: Convert to fraction form
    1,270.36/1,905.72 = 392.94/x
  3. Step 3: Cross multiply
    1,270.36x = 1,905.72 × 392.94
  4. Step 4: Simplify right side
    1,270.36x = 748,833.62
  5. Step 5: Solve for x
    x = 748,833.62/1,270.36
  6. Step 6: Final answer
    x = 589.47

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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.