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Finding the Fourth Proportional to 321.83, 482.75 and 305.42

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Solution

The fourth proportional to 321.83, 482.75 and 305.42 is: 458.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.83 : 482.75 = 305.42 : x
  2. Step 2: Convert to fraction form
    321.83/482.75 = 305.42/x
  3. Step 3: Cross multiply
    321.83x = 482.75 × 305.42
  4. Step 4: Simplify right side
    321.83x = 147,437.56
  5. Step 5: Solve for x
    x = 147,437.56/321.83
  6. Step 6: Final answer
    x = 458.13

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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.