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Finding the Fourth Proportional to 496.57, 684.84 and 309.87

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Solution

The fourth proportional to 496.57, 684.84 and 309.87 is: 427.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    496.57 : 684.84 = 309.87 : x
  2. Step 2: Convert to fraction form
    496.57/684.84 = 309.87/x
  3. Step 3: Cross multiply
    496.57x = 684.84 × 309.87
  4. Step 4: Simplify right side
    496.57x = 212,211.37
  5. Step 5: Solve for x
    x = 212,211.37/496.57
  6. Step 6: Final answer
    x = 427.35

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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.