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Finding the Fourth Proportional to 612.88, 919.44 and 324.64

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Solution

The fourth proportional to 612.88, 919.44 and 324.64 is: 487.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.88 : 919.44 = 324.64 : x
  2. Step 2: Convert to fraction form
    612.88/919.44 = 324.64/x
  3. Step 3: Cross multiply
    612.88x = 919.44 × 324.64
  4. Step 4: Simplify right side
    612.88x = 298,487.00
  5. Step 5: Solve for x
    x = 298,487.00/612.88
  6. Step 6: Final answer
    x = 487.02

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.