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Finding the Fourth Proportional to 571.12, 788.15 and 322.43

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Solution

The fourth proportional to 571.12, 788.15 and 322.43 is: 444.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.12 : 788.15 = 322.43 : x
  2. Step 2: Convert to fraction form
    571.12/788.15 = 322.43/x
  3. Step 3: Cross multiply
    571.12x = 788.15 × 322.43
  4. Step 4: Simplify right side
    571.12x = 254,120.07
  5. Step 5: Solve for x
    x = 254,120.07/571.12
  6. Step 6: Final answer
    x = 444.95

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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.