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Finding the Fourth Proportional to 497.90, 687.09 and 276.86

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Solution

The fourth proportional to 497.90, 687.09 and 276.86 is: 382.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    497.90 : 687.09 = 276.86 : x
  2. Step 2: Convert to fraction form
    497.90/687.09 = 276.86/x
  3. Step 3: Cross multiply
    497.90x = 687.09 × 276.86
  4. Step 4: Simplify right side
    497.90x = 190,226.02
  5. Step 5: Solve for x
    x = 190,226.02/497.90
  6. Step 6: Final answer
    x = 382.06

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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.