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Finding the Fourth Proportional to 611.88, 918 and 323.52

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Solution

The fourth proportional to 611.88, 918 and 323.52 is: 485.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.88 : 918 = 323.52 : x
  2. Step 2: Convert to fraction form
    611.88/918 = 323.52/x
  3. Step 3: Cross multiply
    611.88x = 918 × 323.52
  4. Step 4: Simplify right side
    611.88x = 296,991.36
  5. Step 5: Solve for x
    x = 296,991.36/611.88
  6. Step 6: Final answer
    x = 485.38

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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.