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Finding the Fourth Proportional to 571.48, 856.38 and 311.44

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Solution

The fourth proportional to 571.48, 856.38 and 311.44 is: 466.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.48 : 856.38 = 311.44 : x
  2. Step 2: Convert to fraction form
    571.48/856.38 = 311.44/x
  3. Step 3: Cross multiply
    571.48x = 856.38 × 311.44
  4. Step 4: Simplify right side
    571.48x = 266,710.99
  5. Step 5: Solve for x
    x = 266,710.99/571.48
  6. Step 6: Final answer
    x = 466.70

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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.