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Finding the Fourth Proportional to 636.98, 879.05 and 357.23

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Solution

The fourth proportional to 636.98, 879.05 and 357.23 is: 492.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.98 : 879.05 = 357.23 : x
  2. Step 2: Convert to fraction form
    636.98/879.05 = 357.23/x
  3. Step 3: Cross multiply
    636.98x = 879.05 × 357.23
  4. Step 4: Simplify right side
    636.98x = 314,019.53
  5. Step 5: Solve for x
    x = 314,019.53/636.98
  6. Step 6: Final answer
    x = 492.99

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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.