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Finding the Fourth Proportional to 571.05, 855.83 and 258.47

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Solution

The fourth proportional to 571.05, 855.83 and 258.47 is: 387.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.05 : 855.83 = 258.47 : x
  2. Step 2: Convert to fraction form
    571.05/855.83 = 258.47/x
  3. Step 3: Cross multiply
    571.05x = 855.83 × 258.47
  4. Step 4: Simplify right side
    571.05x = 221,206.38
  5. Step 5: Solve for x
    x = 221,206.38/571.05
  6. Step 6: Final answer
    x = 387.37

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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.