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Finding the Fourth Proportional to 853.26, 1,177.38 and 480.21

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Solution

The fourth proportional to 853.26, 1,177.38 and 480.21 is: 662.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    853.26 : 1,177.38 = 480.21 : x
  2. Step 2: Convert to fraction form
    853.26/1,177.38 = 480.21/x
  3. Step 3: Cross multiply
    853.26x = 1,177.38 × 480.21
  4. Step 4: Simplify right side
    853.26x = 565,389.65
  5. Step 5: Solve for x
    x = 565,389.65/853.26
  6. Step 6: Final answer
    x = 662.62

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1.5x scale

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.