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Finding the Fourth Proportional to 571.57, 856.52 and 311.35

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Solution

The fourth proportional to 571.57, 856.52 and 311.35 is: 466.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.57 : 856.52 = 311.35 : x
  2. Step 2: Convert to fraction form
    571.57/856.52 = 311.35/x
  3. Step 3: Cross multiply
    571.57x = 856.52 × 311.35
  4. Step 4: Simplify right side
    571.57x = 266,677.50
  5. Step 5: Solve for x
    x = 266,677.50/571.57
  6. Step 6: Final answer
    x = 466.57

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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.