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Finding the Fourth Proportional to 498.06, 686.52 and 379.64

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Solution

The fourth proportional to 498.06, 686.52 and 379.64 is: 523.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.06 : 686.52 = 379.64 : x
  2. Step 2: Convert to fraction form
    498.06/686.52 = 379.64/x
  3. Step 3: Cross multiply
    498.06x = 686.52 × 379.64
  4. Step 4: Simplify right side
    498.06x = 260,630.45
  5. Step 5: Solve for x
    x = 260,630.45/498.06
  6. Step 6: Final answer
    x = 523.29

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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.