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Finding the Fourth Proportional to 788.98, 1,183.48 and 442.26

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Solution

The fourth proportional to 788.98, 1,183.48 and 442.26 is: 663.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    788.98 : 1,183.48 = 442.26 : x
  2. Step 2: Convert to fraction form
    788.98/1,183.48 = 442.26/x
  3. Step 3: Cross multiply
    788.98x = 1,183.48 × 442.26
  4. Step 4: Simplify right side
    788.98x = 523,405.86
  5. Step 5: Solve for x
    x = 523,405.86/788.98
  6. Step 6: Final answer
    x = 663.40

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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.