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Finding the Fourth Proportional to 498.22, 687.55 and 277.19

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Solution

The fourth proportional to 498.22, 687.55 and 277.19 is: 382.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.22 : 687.55 = 277.19 : x
  2. Step 2: Convert to fraction form
    498.22/687.55 = 277.19/x
  3. Step 3: Cross multiply
    498.22x = 687.55 × 277.19
  4. Step 4: Simplify right side
    498.22x = 190,582.68
  5. Step 5: Solve for x
    x = 190,582.68/498.22
  6. Step 6: Final answer
    x = 382.53

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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.