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Finding the Fourth Proportional to 570.82, 856.26 and 327.40

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Solution

The fourth proportional to 570.82, 856.26 and 327.40 is: 491.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.82 : 856.26 = 327.40 : x
  2. Step 2: Convert to fraction form
    570.82/856.26 = 327.40/x
  3. Step 3: Cross multiply
    570.82x = 856.26 × 327.40
  4. Step 4: Simplify right side
    570.82x = 280,339.52
  5. Step 5: Solve for x
    x = 280,339.52/570.82
  6. Step 6: Final answer
    x = 491.12

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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.