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Finding the Fourth Proportional to 357.82, 493.95 and 339.64

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Solution

The fourth proportional to 357.82, 493.95 and 339.64 is: 468.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.82 : 493.95 = 339.64 : x
  2. Step 2: Convert to fraction form
    357.82/493.95 = 339.64/x
  3. Step 3: Cross multiply
    357.82x = 493.95 × 339.64
  4. Step 4: Simplify right side
    357.82x = 167,765.18
  5. Step 5: Solve for x
    x = 167,765.18/357.82
  6. Step 6: Final answer
    x = 468.85

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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.