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Finding the Fourth Proportional to 482.10, 665.12 and 285.54

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Solution

The fourth proportional to 482.10, 665.12 and 285.54 is: 393.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.10 : 665.12 = 285.54 : x
  2. Step 2: Convert to fraction form
    482.10/665.12 = 285.54/x
  3. Step 3: Cross multiply
    482.10x = 665.12 × 285.54
  4. Step 4: Simplify right side
    482.10x = 189,916.94
  5. Step 5: Solve for x
    x = 189,916.94/482.10
  6. Step 6: Final answer
    x = 393.94

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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.