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Finding the Fourth Proportional to 570.38, 854.22 and 447.80

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Solution

The fourth proportional to 570.38, 854.22 and 447.80 is: 670.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.38 : 854.22 = 447.80 : x
  2. Step 2: Convert to fraction form
    570.38/854.22 = 447.80/x
  3. Step 3: Cross multiply
    570.38x = 854.22 × 447.80
  4. Step 4: Simplify right side
    570.38x = 382,519.72
  5. Step 5: Solve for x
    x = 382,519.72/570.38
  6. Step 6: Final answer
    x = 670.64

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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.