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Finding the Fourth Proportional to 453.75, 680.31 and 258.81

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Solution

The fourth proportional to 453.75, 680.31 and 258.81 is: 388.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.75 : 680.31 = 258.81 : x
  2. Step 2: Convert to fraction form
    453.75/680.31 = 258.81/x
  3. Step 3: Cross multiply
    453.75x = 680.31 × 258.81
  4. Step 4: Simplify right side
    453.75x = 176,071.03
  5. Step 5: Solve for x
    x = 176,071.03/453.75
  6. Step 6: Final answer
    x = 388.04

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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.