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Finding the Fourth Proportional to 482.90, 725.85 and 321.62

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Solution

The fourth proportional to 482.90, 725.85 and 321.62 is: 483.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.90 : 725.85 = 321.62 : x
  2. Step 2: Convert to fraction form
    482.90/725.85 = 321.62/x
  3. Step 3: Cross multiply
    482.90x = 725.85 × 321.62
  4. Step 4: Simplify right side
    482.90x = 233,444.25
  5. Step 5: Solve for x
    x = 233,444.25/482.90
  6. Step 6: Final answer
    x = 483.43

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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.