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Finding the Fourth Proportional to 571.69, 855.51 and 449.11

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Solution

The fourth proportional to 571.69, 855.51 and 449.11 is: 672.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.69 : 855.51 = 449.11 : x
  2. Step 2: Convert to fraction form
    571.69/855.51 = 449.11/x
  3. Step 3: Cross multiply
    571.69x = 855.51 × 449.11
  4. Step 4: Simplify right side
    571.69x = 384,218.10
  5. Step 5: Solve for x
    x = 384,218.10/571.69
  6. Step 6: Final answer
    x = 672.07

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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.