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Finding the Fourth Proportional to 570.81, 855.18 and 440.96

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Solution

The fourth proportional to 570.81, 855.18 and 440.96 is: 660.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.81 : 855.18 = 440.96 : x
  2. Step 2: Convert to fraction form
    570.81/855.18 = 440.96/x
  3. Step 3: Cross multiply
    570.81x = 855.18 × 440.96
  4. Step 4: Simplify right side
    570.81x = 377,095.90
  5. Step 5: Solve for x
    x = 377,095.90/570.81
  6. Step 6: Final answer
    x = 660.63

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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.