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Finding the Fourth Proportional to 792.74, 1,187.12 and 480.22

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Solution

The fourth proportional to 792.74, 1,187.12 and 480.22 is: 719.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    792.74 : 1,187.12 = 480.22 : x
  2. Step 2: Convert to fraction form
    792.74/1,187.12 = 480.22/x
  3. Step 3: Cross multiply
    792.74x = 1,187.12 × 480.22
  4. Step 4: Simplify right side
    792.74x = 570,077.00
  5. Step 5: Solve for x
    x = 570,077.00/792.74
  6. Step 6: Final answer
    x = 719.13

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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.