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Finding the Fourth Proportional to 482.28, 665.38 and 307.72

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Solution

The fourth proportional to 482.28, 665.38 and 307.72 is: 424.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.28 : 665.38 = 307.72 : x
  2. Step 2: Convert to fraction form
    482.28/665.38 = 307.72/x
  3. Step 3: Cross multiply
    482.28x = 665.38 × 307.72
  4. Step 4: Simplify right side
    482.28x = 204,750.73
  5. Step 5: Solve for x
    x = 204,750.73/482.28
  6. Step 6: Final answer
    x = 424.55

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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.