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Finding the Fourth Proportional to 498.99, 688.58 and 351.92

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Solution

The fourth proportional to 498.99, 688.58 and 351.92 is: 485.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.99 : 688.58 = 351.92 : x
  2. Step 2: Convert to fraction form
    498.99/688.58 = 351.92/x
  3. Step 3: Cross multiply
    498.99x = 688.58 × 351.92
  4. Step 4: Simplify right side
    498.99x = 242,323.43
  5. Step 5: Solve for x
    x = 242,323.43/498.99
  6. Step 6: Final answer
    x = 485.63

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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.