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Finding the Fourth Proportional to 455.85, 682.56 and 395.10

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Solution

The fourth proportional to 455.85, 682.56 and 395.10 is: 591.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.85 : 682.56 = 395.10 : x
  2. Step 2: Convert to fraction form
    455.85/682.56 = 395.10/x
  3. Step 3: Cross multiply
    455.85x = 682.56 × 395.10
  4. Step 4: Simplify right side
    455.85x = 269,679.46
  5. Step 5: Solve for x
    x = 269,679.46/455.85
  6. Step 6: Final answer
    x = 591.60

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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.