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Finding the Fourth Proportional to 325.26, 485.46 and 319.86

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Solution

The fourth proportional to 325.26, 485.46 and 319.86 is: 477.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    325.26 : 485.46 = 319.86 : x
  2. Step 2: Convert to fraction form
    325.26/485.46 = 319.86/x
  3. Step 3: Cross multiply
    325.26x = 485.46 × 319.86
  4. Step 4: Simplify right side
    325.26x = 155,279.24
  5. Step 5: Solve for x
    x = 155,279.24/325.26
  6. Step 6: Final answer
    x = 477.40

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.