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Finding the Fourth Proportional to 570.56, 855.51 and 281.99

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Solution

The fourth proportional to 570.56, 855.51 and 281.99 is: 422.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.56 : 855.51 = 281.99 : x
  2. Step 2: Convert to fraction form
    570.56/855.51 = 281.99/x
  3. Step 3: Cross multiply
    570.56x = 855.51 × 281.99
  4. Step 4: Simplify right side
    570.56x = 241,240.99
  5. Step 5: Solve for x
    x = 241,240.99/570.56
  6. Step 6: Final answer
    x = 422.82

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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.