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Finding the Fourth Proportional to 406.80, 606.84 and 351.60

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Solution

The fourth proportional to 406.80, 606.84 and 351.60 is: 524.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.80 : 606.84 = 351.60 : x
  2. Step 2: Convert to fraction form
    406.80/606.84 = 351.60/x
  3. Step 3: Cross multiply
    406.80x = 606.84 × 351.60
  4. Step 4: Simplify right side
    406.80x = 213,364.94
  5. Step 5: Solve for x
    x = 213,364.94/406.80
  6. Step 6: Final answer
    x = 524.50

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.