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Finding the Fourth Proportional to 468.80, 646.92 and 261.80

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Solution

The fourth proportional to 468.80, 646.92 and 261.80 is: 361.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    468.80 : 646.92 = 261.80 : x
  2. Step 2: Convert to fraction form
    468.80/646.92 = 261.80/x
  3. Step 3: Cross multiply
    468.80x = 646.92 × 261.80
  4. Step 4: Simplify right side
    468.80x = 169,363.66
  5. Step 5: Solve for x
    x = 169,363.66/468.80
  6. Step 6: Final answer
    x = 361.27

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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.