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Finding the Fourth Proportional to 497.60, 687 and 450.80

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Solution

The fourth proportional to 497.60, 687 and 450.80 is: 622.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    497.60 : 687 = 450.80 : x
  2. Step 2: Convert to fraction form
    497.60/687 = 450.80/x
  3. Step 3: Cross multiply
    497.60x = 687 × 450.80
  4. Step 4: Simplify right side
    497.60x = 309,699.60
  5. Step 5: Solve for x
    x = 309,699.60/497.60
  6. Step 6: Final answer
    x = 622.39

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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.