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Finding the Fourth Proportional to 496.74, 686.38 and 357.32

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Solution

The fourth proportional to 496.74, 686.38 and 357.32 is: 493.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    496.74 : 686.38 = 357.32 : x
  2. Step 2: Convert to fraction form
    496.74/686.38 = 357.32/x
  3. Step 3: Cross multiply
    496.74x = 686.38 × 357.32
  4. Step 4: Simplify right side
    496.74x = 245,254.93
  5. Step 5: Solve for x
    x = 245,254.93/496.74
  6. Step 6: Final answer
    x = 493.73

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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.