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Finding the Fourth Proportional to 792.37, 1,188.49 and 518.05

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Solution

The fourth proportional to 792.37, 1,188.49 and 518.05 is: 777.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    792.37 : 1,188.49 = 518.05 : x
  2. Step 2: Convert to fraction form
    792.37/1,188.49 = 518.05/x
  3. Step 3: Cross multiply
    792.37x = 1,188.49 × 518.05
  4. Step 4: Simplify right side
    792.37x = 615,697.24
  5. Step 5: Solve for x
    x = 615,697.24/792.37
  6. Step 6: Final answer
    x = 777.03

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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.