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Finding the Fourth Proportional to 789, 1,183.59 and 404.34

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Solution

The fourth proportional to 789, 1,183.59 and 404.34 is: 606.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    789 : 1,183.59 = 404.34 : x
  2. Step 2: Convert to fraction form
    789/1,183.59 = 404.34/x
  3. Step 3: Cross multiply
    789x = 1,183.59 × 404.34
  4. Step 4: Simplify right side
    789x = 478,572.78
  5. Step 5: Solve for x
    x = 478,572.78/789
  6. Step 6: Final answer
    x = 606.56

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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.