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Finding the Fourth Proportional to 498.26, 687.61 and 277.23

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Solution

The fourth proportional to 498.26, 687.61 and 277.23 is: 382.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.26 : 687.61 = 277.23 : x
  2. Step 2: Convert to fraction form
    498.26/687.61 = 277.23/x
  3. Step 3: Cross multiply
    498.26x = 687.61 × 277.23
  4. Step 4: Simplify right side
    498.26x = 190,626.12
  5. Step 5: Solve for x
    x = 190,626.12/498.26
  6. Step 6: Final answer
    x = 382.59

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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.