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Finding the Fourth Proportional to 571.22, 788.18 and 338.40

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Solution

The fourth proportional to 571.22, 788.18 and 338.40 is: 466.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.22 : 788.18 = 338.40 : x
  2. Step 2: Convert to fraction form
    571.22/788.18 = 338.40/x
  3. Step 3: Cross multiply
    571.22x = 788.18 × 338.40
  4. Step 4: Simplify right side
    571.22x = 266,720.11
  5. Step 5: Solve for x
    x = 266,720.11/571.22
  6. Step 6: Final answer
    x = 466.93

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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.