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Finding the Fourth Proportional to 571.80, 857.16 and 279.12

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Solution

The fourth proportional to 571.80, 857.16 and 279.12 is: 418.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.80 : 857.16 = 279.12 : x
  2. Step 2: Convert to fraction form
    571.80/857.16 = 279.12/x
  3. Step 3: Cross multiply
    571.80x = 857.16 × 279.12
  4. Step 4: Simplify right side
    571.80x = 239,250.50
  5. Step 5: Solve for x
    x = 239,250.50/571.80
  6. Step 6: Final answer
    x = 418.42

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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.