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Finding the Fourth Proportional to 853.23, 1,177.53 and 480.21

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Solution

The fourth proportional to 853.23, 1,177.53 and 480.21 is: 662.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    853.23 : 1,177.53 = 480.21 : x
  2. Step 2: Convert to fraction form
    853.23/1,177.53 = 480.21/x
  3. Step 3: Cross multiply
    853.23x = 1,177.53 × 480.21
  4. Step 4: Simplify right side
    853.23x = 565,461.68
  5. Step 5: Solve for x
    x = 565,461.68/853.23
  6. Step 6: Final answer
    x = 662.73

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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.