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Finding the Fourth Proportional to 310.64, 428.09 and 245.03

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Solution

The fourth proportional to 310.64, 428.09 and 245.03 is: 337.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    310.64 : 428.09 = 245.03 : x
  2. Step 2: Convert to fraction form
    310.64/428.09 = 245.03/x
  3. Step 3: Cross multiply
    310.64x = 428.09 × 245.03
  4. Step 4: Simplify right side
    310.64x = 104,891.53
  5. Step 5: Solve for x
    x = 104,891.53/310.64
  6. Step 6: Final answer
    x = 337.67

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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.