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Finding the Fourth Proportional to 357.40, 493.38 and 252.76

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Solution

The fourth proportional to 357.40, 493.38 and 252.76 is: 348.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.40 : 493.38 = 252.76 : x
  2. Step 2: Convert to fraction form
    357.40/493.38 = 252.76/x
  3. Step 3: Cross multiply
    357.40x = 493.38 × 252.76
  4. Step 4: Simplify right side
    357.40x = 124,706.73
  5. Step 5: Solve for x
    x = 124,706.73/357.40
  6. Step 6: Final answer
    x = 348.93

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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.