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Finding the Fourth Proportional to 468.75, 646.88 and 261.75

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Solution

The fourth proportional to 468.75, 646.88 and 261.75 is: 361.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    468.75 : 646.88 = 261.75 : x
  2. Step 2: Convert to fraction form
    468.75/646.88 = 261.75/x
  3. Step 3: Cross multiply
    468.75x = 646.88 × 261.75
  4. Step 4: Simplify right side
    468.75x = 169,319.53
  5. Step 5: Solve for x
    x = 169,319.53/468.75
  6. Step 6: Final answer
    x = 361.22

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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.