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Finding the Fourth Proportional to 794.48, 1,189.96 and 403.79

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Solution

The fourth proportional to 794.48, 1,189.96 and 403.79 is: 604.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    794.48 : 1,189.96 = 403.79 : x
  2. Step 2: Convert to fraction form
    794.48/1,189.96 = 403.79/x
  3. Step 3: Cross multiply
    794.48x = 1,189.96 × 403.79
  4. Step 4: Simplify right side
    794.48x = 480,495.91
  5. Step 5: Solve for x
    x = 480,495.91/794.48
  6. Step 6: Final answer
    x = 604.80

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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.