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Finding the Fourth Proportional to 571.12, 856.74 and 186.38

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Solution

The fourth proportional to 571.12, 856.74 and 186.38 is: 279.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.12 : 856.74 = 186.38 : x
  2. Step 2: Convert to fraction form
    571.12/856.74 = 186.38/x
  3. Step 3: Cross multiply
    571.12x = 856.74 × 186.38
  4. Step 4: Simplify right side
    571.12x = 159,679.20
  5. Step 5: Solve for x
    x = 159,679.20/571.12
  6. Step 6: Final answer
    x = 279.59

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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.