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Finding the Fourth Proportional to 570.91, 856.37 and 449.82

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Solution

The fourth proportional to 570.91, 856.37 and 449.82 is: 674.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.91 : 856.37 = 449.82 : x
  2. Step 2: Convert to fraction form
    570.91/856.37 = 449.82/x
  3. Step 3: Cross multiply
    570.91x = 856.37 × 449.82
  4. Step 4: Simplify right side
    570.91x = 385,212.35
  5. Step 5: Solve for x
    x = 385,212.35/570.91
  6. Step 6: Final answer
    x = 674.73

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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.