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Finding the Fourth Proportional to 420.01, 579.48 and 254.17

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Solution

The fourth proportional to 420.01, 579.48 and 254.17 is: 350.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    420.01 : 579.48 = 254.17 : x
  2. Step 2: Convert to fraction form
    420.01/579.48 = 254.17/x
  3. Step 3: Cross multiply
    420.01x = 579.48 × 254.17
  4. Step 4: Simplify right side
    420.01x = 147,286.43
  5. Step 5: Solve for x
    x = 147,286.43/420.01
  6. Step 6: Final answer
    x = 350.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.