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Finding the Fourth Proportional to 456.80, 684 and 263.60

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Solution

The fourth proportional to 456.80, 684 and 263.60 is: 394.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.80 : 684 = 263.60 : x
  2. Step 2: Convert to fraction form
    456.80/684 = 263.60/x
  3. Step 3: Cross multiply
    456.80x = 684 × 263.60
  4. Step 4: Simplify right side
    456.80x = 180,302.40
  5. Step 5: Solve for x
    x = 180,302.40/456.80
  6. Step 6: Final answer
    x = 394.71

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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.