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Finding the Fourth Proportional to 453.68, 680.64 and 385.36

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Solution

The fourth proportional to 453.68, 680.64 and 385.36 is: 578.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.68 : 680.64 = 385.36 : x
  2. Step 2: Convert to fraction form
    453.68/680.64 = 385.36/x
  3. Step 3: Cross multiply
    453.68x = 680.64 × 385.36
  4. Step 4: Simplify right side
    453.68x = 262,291.43
  5. Step 5: Solve for x
    x = 262,291.43/453.68
  6. Step 6: Final answer
    x = 578.14

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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.