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Finding the Fourth Proportional to 491.43, 736.79 and 423.75

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Solution

The fourth proportional to 491.43, 736.79 and 423.75 is: 635.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    491.43 : 736.79 = 423.75 : x
  2. Step 2: Convert to fraction form
    491.43/736.79 = 423.75/x
  3. Step 3: Cross multiply
    491.43x = 736.79 × 423.75
  4. Step 4: Simplify right side
    491.43x = 312,212.64
  5. Step 5: Solve for x
    x = 312,212.64/491.43
  6. Step 6: Final answer
    x = 635.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.