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Finding the Fourth Proportional to 357.24, 493.38 and 280.20

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Solution

The fourth proportional to 357.24, 493.38 and 280.20 is: 386.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.24 : 493.38 = 280.20 : x
  2. Step 2: Convert to fraction form
    357.24/493.38 = 280.20/x
  3. Step 3: Cross multiply
    357.24x = 493.38 × 280.20
  4. Step 4: Simplify right side
    357.24x = 138,245.08
  5. Step 5: Solve for x
    x = 138,245.08/357.24
  6. Step 6: Final answer
    x = 386.98

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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.