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Finding the Fourth Proportional to 876.11, 1,313.34 and 327.92

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Solution

The fourth proportional to 876.11, 1,313.34 and 327.92 is: 491.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    876.11 : 1,313.34 = 327.92 : x
  2. Step 2: Convert to fraction form
    876.11/1,313.34 = 327.92/x
  3. Step 3: Cross multiply
    876.11x = 1,313.34 × 327.92
  4. Step 4: Simplify right side
    876.11x = 430,670.45
  5. Step 5: Solve for x
    x = 430,670.45/876.11
  6. Step 6: Final answer
    x = 491.57

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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.