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Finding the Fourth Proportional to 325.44, 485.55 and 309.99

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Solution

The fourth proportional to 325.44, 485.55 and 309.99 is: 462.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    325.44 : 485.55 = 309.99 : x
  2. Step 2: Convert to fraction form
    325.44/485.55 = 309.99/x
  3. Step 3: Cross multiply
    325.44x = 485.55 × 309.99
  4. Step 4: Simplify right side
    325.44x = 150,515.64
  5. Step 5: Solve for x
    x = 150,515.64/325.44
  6. Step 6: Final answer
    x = 462.50

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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.