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Finding the Fourth Proportional to 571.58, 788.49 and 338.70

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Solution

The fourth proportional to 571.58, 788.49 and 338.70 is: 467.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.58 : 788.49 = 338.70 : x
  2. Step 2: Convert to fraction form
    571.58/788.49 = 338.70/x
  3. Step 3: Cross multiply
    571.58x = 788.49 × 338.70
  4. Step 4: Simplify right side
    571.58x = 267,061.56
  5. Step 5: Solve for x
    x = 267,061.56/571.58
  6. Step 6: Final answer
    x = 467.24

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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.