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Finding the Fourth Proportional to 453.11, 625.31 and 256.68

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Solution

The fourth proportional to 453.11, 625.31 and 256.68 is: 354.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.11 : 625.31 = 256.68 : x
  2. Step 2: Convert to fraction form
    453.11/625.31 = 256.68/x
  3. Step 3: Cross multiply
    453.11x = 625.31 × 256.68
  4. Step 4: Simplify right side
    453.11x = 160,503.29
  5. Step 5: Solve for x
    x = 160,503.29/453.11
  6. Step 6: Final answer
    x = 354.23

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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.