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Finding the Fourth Proportional to 571.18, 788.21 and 322.49

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Solution

The fourth proportional to 571.18, 788.21 and 322.49 is: 445.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.18 : 788.21 = 322.49 : x
  2. Step 2: Convert to fraction form
    571.18/788.21 = 322.49/x
  3. Step 3: Cross multiply
    571.18x = 788.21 × 322.49
  4. Step 4: Simplify right side
    571.18x = 254,189.84
  5. Step 5: Solve for x
    x = 254,189.84/571.18
  6. Step 6: Final answer
    x = 445.03

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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.