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Finding the Fourth Proportional to 792.15, 1,188.21 and 304.92

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Solution

The fourth proportional to 792.15, 1,188.21 and 304.92 is: 457.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    792.15 : 1,188.21 = 304.92 : x
  2. Step 2: Convert to fraction form
    792.15/1,188.21 = 304.92/x
  3. Step 3: Cross multiply
    792.15x = 1,188.21 × 304.92
  4. Step 4: Simplify right side
    792.15x = 362,308.99
  5. Step 5: Solve for x
    x = 362,308.99/792.15
  6. Step 6: Final answer
    x = 457.37

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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.