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Finding the Fourth Proportional to 498.36, 686.31 and 496.85

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Solution

The fourth proportional to 498.36, 686.31 and 496.85 is: 684.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.36 : 686.31 = 496.85 : x
  2. Step 2: Convert to fraction form
    498.36/686.31 = 496.85/x
  3. Step 3: Cross multiply
    498.36x = 686.31 × 496.85
  4. Step 4: Simplify right side
    498.36x = 340,987.83
  5. Step 5: Solve for x
    x = 340,987.83/498.36
  6. Step 6: Final answer
    x = 684.21

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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.