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Finding the Fourth Proportional to 357.26, 491.83 and 307.86

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Solution

The fourth proportional to 357.26, 491.83 and 307.86 is: 423.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.26 : 491.83 = 307.86 : x
  2. Step 2: Convert to fraction form
    357.26/491.83 = 307.86/x
  3. Step 3: Cross multiply
    357.26x = 491.83 × 307.86
  4. Step 4: Simplify right side
    357.26x = 151,414.78
  5. Step 5: Solve for x
    x = 151,414.78/357.26
  6. Step 6: Final answer
    x = 423.82

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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.