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Finding the Fourth Proportional to 453.11, 625.32 and 256.66

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Solution

The fourth proportional to 453.11, 625.32 and 256.66 is: 354.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.11 : 625.32 = 256.66 : x
  2. Step 2: Convert to fraction form
    453.11/625.32 = 256.66/x
  3. Step 3: Cross multiply
    453.11x = 625.32 × 256.66
  4. Step 4: Simplify right side
    453.11x = 160,491.50
  5. Step 5: Solve for x
    x = 160,491.50/453.11
  6. Step 6: Final answer
    x = 354.20

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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.