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Finding the Fourth Proportional to 401.80, 602.58 and 321.58

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Solution

The fourth proportional to 401.80, 602.58 and 321.58 is: 482.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.80 : 602.58 = 321.58 : x
  2. Step 2: Convert to fraction form
    401.80/602.58 = 321.58/x
  3. Step 3: Cross multiply
    401.80x = 602.58 × 321.58
  4. Step 4: Simplify right side
    401.80x = 193,777.68
  5. Step 5: Solve for x
    x = 193,777.68/401.80
  6. Step 6: Final answer
    x = 482.27

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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.