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Finding the Fourth Proportional to 808.58, 1,211.94 and 346.07

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Solution

The fourth proportional to 808.58, 1,211.94 and 346.07 is: 518.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    808.58 : 1,211.94 = 346.07 : x
  2. Step 2: Convert to fraction form
    808.58/1,211.94 = 346.07/x
  3. Step 3: Cross multiply
    808.58x = 1,211.94 × 346.07
  4. Step 4: Simplify right side
    808.58x = 419,416.08
  5. Step 5: Solve for x
    x = 419,416.08/808.58
  6. Step 6: Final answer
    x = 518.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.