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Finding the Fourth Proportional to 788.34, 1,183.38 and 423.03

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Solution

The fourth proportional to 788.34, 1,183.38 and 423.03 is: 635.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    788.34 : 1,183.38 = 423.03 : x
  2. Step 2: Convert to fraction form
    788.34/1,183.38 = 423.03/x
  3. Step 3: Cross multiply
    788.34x = 1,183.38 × 423.03
  4. Step 4: Simplify right side
    788.34x = 500,605.24
  5. Step 5: Solve for x
    x = 500,605.24/788.34
  6. Step 6: Final answer
    x = 635.01

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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.