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Finding the Fourth Proportional to 612.68, 845.46 and 379.88

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Solution

The fourth proportional to 612.68, 845.46 and 379.88 is: 524.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.68 : 845.46 = 379.88 : x
  2. Step 2: Convert to fraction form
    612.68/845.46 = 379.88/x
  3. Step 3: Cross multiply
    612.68x = 845.46 × 379.88
  4. Step 4: Simplify right side
    612.68x = 321,173.34
  5. Step 5: Solve for x
    x = 321,173.34/612.68
  6. Step 6: Final answer
    x = 524.21

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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.