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Finding the Fourth Proportional to 445.38, 613.62 and 357.90

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Solution

The fourth proportional to 445.38, 613.62 and 357.90 is: 493.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.38 : 613.62 = 357.90 : x
  2. Step 2: Convert to fraction form
    445.38/613.62 = 357.90/x
  3. Step 3: Cross multiply
    445.38x = 613.62 × 357.90
  4. Step 4: Simplify right side
    445.38x = 219,614.60
  5. Step 5: Solve for x
    x = 219,614.60/445.38
  6. Step 6: Final answer
    x = 493.09

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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.