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Finding the Fourth Proportional to 570.96, 856.80 and 205.77

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Solution

The fourth proportional to 570.96, 856.80 and 205.77 is: 308.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.96 : 856.80 = 205.77 : x
  2. Step 2: Convert to fraction form
    570.96/856.80 = 205.77/x
  3. Step 3: Cross multiply
    570.96x = 856.80 × 205.77
  4. Step 4: Simplify right side
    570.96x = 176,305.72
  5. Step 5: Solve for x
    x = 176,305.72/570.96
  6. Step 6: Final answer
    x = 308.79

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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.