Home / 1,270.24-1,905.09-404.80

Finding the Fourth Proportional to 1,270.24, 1,905.09 and 404.80

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Solution

The fourth proportional to 1,270.24, 1,905.09 and 404.80 is: 607.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,270.24 : 1,905.09 = 404.80 : x
  2. Step 2: Convert to fraction form
    1,270.24/1,905.09 = 404.80/x
  3. Step 3: Cross multiply
    1,270.24x = 1,905.09 × 404.80
  4. Step 4: Simplify right side
    1,270.24x = 771,180.43
  5. Step 5: Solve for x
    x = 771,180.43/1,270.24
  6. Step 6: Final answer
    x = 607.11

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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.