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Finding the Fourth Proportional to 639.14, 882.26 and 482.24

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Solution

The fourth proportional to 639.14, 882.26 and 482.24 is: 665.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.14 : 882.26 = 482.24 : x
  2. Step 2: Convert to fraction form
    639.14/882.26 = 482.24/x
  3. Step 3: Cross multiply
    639.14x = 882.26 × 482.24
  4. Step 4: Simplify right side
    639.14x = 425,457.70
  5. Step 5: Solve for x
    x = 425,457.70/639.14
  6. Step 6: Final answer
    x = 665.67

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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.