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Finding the Fourth Proportional to 612.17, 845.18 and 379.70

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Solution

The fourth proportional to 612.17, 845.18 and 379.70 is: 524.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.17 : 845.18 = 379.70 : x
  2. Step 2: Convert to fraction form
    612.17/845.18 = 379.70/x
  3. Step 3: Cross multiply
    612.17x = 845.18 × 379.70
  4. Step 4: Simplify right side
    612.17x = 320,914.85
  5. Step 5: Solve for x
    x = 320,914.85/612.17
  6. Step 6: Final answer
    x = 524.23

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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.