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Finding the Fourth Proportional to 570.87, 856.71 and 426.96

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Solution

The fourth proportional to 570.87, 856.71 and 426.96 is: 640.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.87 : 856.71 = 426.96 : x
  2. Step 2: Convert to fraction form
    570.87/856.71 = 426.96/x
  3. Step 3: Cross multiply
    570.87x = 856.71 × 426.96
  4. Step 4: Simplify right side
    570.87x = 365,780.90
  5. Step 5: Solve for x
    x = 365,780.90/570.87
  6. Step 6: Final answer
    x = 640.74

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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.