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Finding the Fourth Proportional to 853.37, 1,177.63 and 480.35

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Solution

The fourth proportional to 853.37, 1,177.63 and 480.35 is: 662.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    853.37 : 1,177.63 = 480.35 : x
  2. Step 2: Convert to fraction form
    853.37/1,177.63 = 480.35/x
  3. Step 3: Cross multiply
    853.37x = 1,177.63 × 480.35
  4. Step 4: Simplify right side
    853.37x = 565,672.83
  5. Step 5: Solve for x
    x = 565,672.83/853.37
  6. Step 6: Final answer
    x = 662.87

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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.