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Finding the Fourth Proportional to 370.58, 553.22 and 321.98

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Solution

The fourth proportional to 370.58, 553.22 and 321.98 is: 480.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.58 : 553.22 = 321.98 : x
  2. Step 2: Convert to fraction form
    370.58/553.22 = 321.98/x
  3. Step 3: Cross multiply
    370.58x = 553.22 × 321.98
  4. Step 4: Simplify right side
    370.58x = 178,125.78
  5. Step 5: Solve for x
    x = 178,125.78/370.58
  6. Step 6: Final answer
    x = 480.67

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.