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Finding the Fourth Proportional to 498.48, 687.99 and 380.26

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Solution

The fourth proportional to 498.48, 687.99 and 380.26 is: 524.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.48 : 687.99 = 380.26 : x
  2. Step 2: Convert to fraction form
    498.48/687.99 = 380.26/x
  3. Step 3: Cross multiply
    498.48x = 687.99 × 380.26
  4. Step 4: Simplify right side
    498.48x = 261,615.08
  5. Step 5: Solve for x
    x = 261,615.08/498.48
  6. Step 6: Final answer
    x = 524.83

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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.