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Finding the Fourth Proportional to 455.17, 682.11 and 259.77

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Solution

The fourth proportional to 455.17, 682.11 and 259.77 is: 389.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.17 : 682.11 = 259.77 : x
  2. Step 2: Convert to fraction form
    455.17/682.11 = 259.77/x
  3. Step 3: Cross multiply
    455.17x = 682.11 × 259.77
  4. Step 4: Simplify right side
    455.17x = 177,191.71
  5. Step 5: Solve for x
    x = 177,191.71/455.17
  6. Step 6: Final answer
    x = 389.29

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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.