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Finding the Fourth Proportional to 571.44, 856.80 and 378.84

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Solution

The fourth proportional to 571.44, 856.80 and 378.84 is: 568.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.44 : 856.80 = 378.84 : x
  2. Step 2: Convert to fraction form
    571.44/856.80 = 378.84/x
  3. Step 3: Cross multiply
    571.44x = 856.80 × 378.84
  4. Step 4: Simplify right side
    571.44x = 324,590.11
  5. Step 5: Solve for x
    x = 324,590.11/571.44
  6. Step 6: Final answer
    x = 568.02

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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.