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Finding the Fourth Proportional to 571.89, 855.79 and 495.12

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Solution

The fourth proportional to 571.89, 855.79 and 495.12 is: 740.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.89 : 855.79 = 495.12 : x
  2. Step 2: Convert to fraction form
    571.89/855.79 = 495.12/x
  3. Step 3: Cross multiply
    571.89x = 855.79 × 495.12
  4. Step 4: Simplify right side
    571.89x = 423,716.70
  5. Step 5: Solve for x
    x = 423,716.70/571.89
  6. Step 6: Final answer
    x = 740.90

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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.