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Finding the Fourth Proportional to 351.99, 486.18 and 263.87

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Solution

The fourth proportional to 351.99, 486.18 and 263.87 is: 364.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.99 : 486.18 = 263.87 : x
  2. Step 2: Convert to fraction form
    351.99/486.18 = 263.87/x
  3. Step 3: Cross multiply
    351.99x = 486.18 × 263.87
  4. Step 4: Simplify right side
    351.99x = 128,285.89
  5. Step 5: Solve for x
    x = 128,285.89/351.99
  6. Step 6: Final answer
    x = 364.46

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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.