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Finding the Fourth Proportional to 611.35, 843.72 and 349.36

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Solution

The fourth proportional to 611.35, 843.72 and 349.36 is: 482.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.35 : 843.72 = 349.36 : x
  2. Step 2: Convert to fraction form
    611.35/843.72 = 349.36/x
  3. Step 3: Cross multiply
    611.35x = 843.72 × 349.36
  4. Step 4: Simplify right side
    611.35x = 294,762.02
  5. Step 5: Solve for x
    x = 294,762.02/611.35
  6. Step 6: Final answer
    x = 482.15

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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.