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Finding the Fourth Proportional to 456.81, 684.57 and 261.52

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Solution

The fourth proportional to 456.81, 684.57 and 261.52 is: 391.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.81 : 684.57 = 261.52 : x
  2. Step 2: Convert to fraction form
    456.81/684.57 = 261.52/x
  3. Step 3: Cross multiply
    456.81x = 684.57 × 261.52
  4. Step 4: Simplify right side
    456.81x = 179,028.75
  5. Step 5: Solve for x
    x = 179,028.75/456.81
  6. Step 6: Final answer
    x = 391.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.