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Finding the Fourth Proportional to 612.66, 845.49 and 481.44

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Solution

The fourth proportional to 612.66, 845.49 and 481.44 is: 664.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.66 : 845.49 = 481.44 : x
  2. Step 2: Convert to fraction form
    612.66/845.49 = 481.44/x
  3. Step 3: Cross multiply
    612.66x = 845.49 × 481.44
  4. Step 4: Simplify right side
    612.66x = 407,050.30
  5. Step 5: Solve for x
    x = 407,050.30/612.66
  6. Step 6: Final answer
    x = 664.40

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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.