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Finding the Fourth Proportional to 327.89, 451.70 and 312.26

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Solution

The fourth proportional to 327.89, 451.70 and 312.26 is: 430.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    327.89 : 451.70 = 312.26 : x
  2. Step 2: Convert to fraction form
    327.89/451.70 = 312.26/x
  3. Step 3: Cross multiply
    327.89x = 451.70 × 312.26
  4. Step 4: Simplify right side
    327.89x = 141,047.84
  5. Step 5: Solve for x
    x = 141,047.84/327.89
  6. Step 6: Final answer
    x = 430.17

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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.