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Finding the Fourth Proportional to 468.81, 646.96 and 261.81

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Solution

The fourth proportional to 468.81, 646.96 and 261.81 is: 361.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    468.81 : 646.96 = 261.81 : x
  2. Step 2: Convert to fraction form
    468.81/646.96 = 261.81/x
  3. Step 3: Cross multiply
    468.81x = 646.96 × 261.81
  4. Step 4: Simplify right side
    468.81x = 169,382.87
  5. Step 5: Solve for x
    x = 169,382.87/468.81
  6. Step 6: Final answer
    x = 361.30

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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.