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Finding the Fourth Proportional to 712.36, 1,068.06 and 327.40

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Solution

The fourth proportional to 712.36, 1,068.06 and 327.40 is: 490.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    712.36 : 1,068.06 = 327.40 : x
  2. Step 2: Convert to fraction form
    712.36/1,068.06 = 327.40/x
  3. Step 3: Cross multiply
    712.36x = 1,068.06 × 327.40
  4. Step 4: Simplify right side
    712.36x = 349,682.84
  5. Step 5: Solve for x
    x = 349,682.84/712.36
  6. Step 6: Final answer
    x = 490.88

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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.