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Finding the Fourth Proportional to 498.41, 687.80 and 277.39

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Solution

The fourth proportional to 498.41, 687.80 and 277.39 is: 382.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.41 : 687.80 = 277.39 : x
  2. Step 2: Convert to fraction form
    498.41/687.80 = 277.39/x
  3. Step 3: Cross multiply
    498.41x = 687.80 × 277.39
  4. Step 4: Simplify right side
    498.41x = 190,788.84
  5. Step 5: Solve for x
    x = 190,788.84/498.41
  6. Step 6: Final answer
    x = 382.79

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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.