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Finding the Fourth Proportional to 853.06, 1,177.21 and 480.06

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Solution

The fourth proportional to 853.06, 1,177.21 and 480.06 is: 662.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    853.06 : 1,177.21 = 480.06 : x
  2. Step 2: Convert to fraction form
    853.06/1,177.21 = 480.06/x
  3. Step 3: Cross multiply
    853.06x = 1,177.21 × 480.06
  4. Step 4: Simplify right side
    853.06x = 565,131.43
  5. Step 5: Solve for x
    x = 565,131.43/853.06
  6. Step 6: Final answer
    x = 662.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.