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Finding the Fourth Proportional to 571.29, 856.92 and 278.82

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Solution

The fourth proportional to 571.29, 856.92 and 278.82 is: 418.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.29 : 856.92 = 278.82 : x
  2. Step 2: Convert to fraction form
    571.29/856.92 = 278.82/x
  3. Step 3: Cross multiply
    571.29x = 856.92 × 278.82
  4. Step 4: Simplify right side
    571.29x = 238,926.43
  5. Step 5: Solve for x
    x = 238,926.43/571.29
  6. Step 6: Final answer
    x = 418.22

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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.