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Finding the Fourth Proportional to 357.87, 493.84 and 208.51

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Solution

The fourth proportional to 357.87, 493.84 and 208.51 is: 287.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.87 : 493.84 = 208.51 : x
  2. Step 2: Convert to fraction form
    357.87/493.84 = 208.51/x
  3. Step 3: Cross multiply
    357.87x = 493.84 × 208.51
  4. Step 4: Simplify right side
    357.87x = 102,970.58
  5. Step 5: Solve for x
    x = 102,970.58/357.87
  6. Step 6: Final answer
    x = 287.73

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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.