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Finding the Fourth Proportional to 498.24, 687.84 and 343.20

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Solution

The fourth proportional to 498.24, 687.84 and 343.20 is: 473.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.24 : 687.84 = 343.20 : x
  2. Step 2: Convert to fraction form
    498.24/687.84 = 343.20/x
  3. Step 3: Cross multiply
    498.24x = 687.84 × 343.20
  4. Step 4: Simplify right side
    498.24x = 236,066.69
  5. Step 5: Solve for x
    x = 236,066.69/498.24
  6. Step 6: Final answer
    x = 473.80

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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.