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Finding the Fourth Proportional to 854.22, 1,178.91 and 559.65

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Solution

The fourth proportional to 854.22, 1,178.91 and 559.65 is: 772.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    854.22 : 1,178.91 = 559.65 : x
  2. Step 2: Convert to fraction form
    854.22/1,178.91 = 559.65/x
  3. Step 3: Cross multiply
    854.22x = 1,178.91 × 559.65
  4. Step 4: Simplify right side
    854.22x = 659,776.98
  5. Step 5: Solve for x
    x = 659,776.98/854.22
  6. Step 6: Final answer
    x = 772.37

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.