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Finding the Fourth Proportional to 327.72, 452.40 and 313.92

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Solution

The fourth proportional to 327.72, 452.40 and 313.92 is: 433.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    327.72 : 452.40 = 313.92 : x
  2. Step 2: Convert to fraction form
    327.72/452.40 = 313.92/x
  3. Step 3: Cross multiply
    327.72x = 452.40 × 313.92
  4. Step 4: Simplify right side
    327.72x = 142,017.41
  5. Step 5: Solve for x
    x = 142,017.41/327.72
  6. Step 6: Final answer
    x = 433.35

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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.