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Finding the Fourth Proportional to 612.70, 845.55 and 350.80

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Solution

The fourth proportional to 612.70, 845.55 and 350.80 is: 484.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.70 : 845.55 = 350.80 : x
  2. Step 2: Convert to fraction form
    612.70/845.55 = 350.80/x
  3. Step 3: Cross multiply
    612.70x = 845.55 × 350.80
  4. Step 4: Simplify right side
    612.70x = 296,618.94
  5. Step 5: Solve for x
    x = 296,618.94/612.70
  6. Step 6: Final answer
    x = 484.12

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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.