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Finding the Fourth Proportional to 357.80, 493.02 and 247.23

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Solution

The fourth proportional to 357.80, 493.02 and 247.23 is: 340.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.80 : 493.02 = 247.23 : x
  2. Step 2: Convert to fraction form
    357.80/493.02 = 247.23/x
  3. Step 3: Cross multiply
    357.80x = 493.02 × 247.23
  4. Step 4: Simplify right side
    357.80x = 121,889.33
  5. Step 5: Solve for x
    x = 121,889.33/357.80
  6. Step 6: Final answer
    x = 340.67

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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.