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Finding the Fourth Proportional to 513.96, 709.20 and 327.50

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Solution

The fourth proportional to 513.96, 709.20 and 327.50 is: 451.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.96 : 709.20 = 327.50 : x
  2. Step 2: Convert to fraction form
    513.96/709.20 = 327.50/x
  3. Step 3: Cross multiply
    513.96x = 709.20 × 327.50
  4. Step 4: Simplify right side
    513.96x = 232,259.45
  5. Step 5: Solve for x
    x = 232,259.45/513.96
  6. Step 6: Final answer
    x = 451.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.