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Finding the Fourth Proportional to 482.10, 665.30 and 261.05

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Solution

The fourth proportional to 482.10, 665.30 and 261.05 is: 360.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.10 : 665.30 = 261.05 : x
  2. Step 2: Convert to fraction form
    482.10/665.30 = 261.05/x
  3. Step 3: Cross multiply
    482.10x = 665.30 × 261.05
  4. Step 4: Simplify right side
    482.10x = 173,676.57
  5. Step 5: Solve for x
    x = 173,676.57/482.10
  6. Step 6: Final answer
    x = 360.25

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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.