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Finding the Fourth Proportional to 393.77, 591.06 and 322.49

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Solution

The fourth proportional to 393.77, 591.06 and 322.49 is: 484.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    393.77 : 591.06 = 322.49 : x
  2. Step 2: Convert to fraction form
    393.77/591.06 = 322.49/x
  3. Step 3: Cross multiply
    393.77x = 591.06 × 322.49
  4. Step 4: Simplify right side
    393.77x = 190,610.94
  5. Step 5: Solve for x
    x = 190,610.94/393.77
  6. Step 6: Final answer
    x = 484.07

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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.