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Finding the Fourth Proportional to 401.70, 602.98 and 321.50

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Solution

The fourth proportional to 401.70, 602.98 and 321.50 is: 482.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.70 : 602.98 = 321.50 : x
  2. Step 2: Convert to fraction form
    401.70/602.98 = 321.50/x
  3. Step 3: Cross multiply
    401.70x = 602.98 × 321.50
  4. Step 4: Simplify right side
    401.70x = 193,858.07
  5. Step 5: Solve for x
    x = 193,858.07/401.70
  6. Step 6: Final answer
    x = 482.59

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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.