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Finding the Fourth Proportional to 338.55, 507.28 and 299.67

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Solution

The fourth proportional to 338.55, 507.28 and 299.67 is: 449.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    338.55 : 507.28 = 299.67 : x
  2. Step 2: Convert to fraction form
    338.55/507.28 = 299.67/x
  3. Step 3: Cross multiply
    338.55x = 507.28 × 299.67
  4. Step 4: Simplify right side
    338.55x = 152,016.60
  5. Step 5: Solve for x
    x = 152,016.60/338.55
  6. Step 6: Final answer
    x = 449.02

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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.