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Finding the Fourth Proportional to 667.07, 918.37 and 579.70

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Solution

The fourth proportional to 667.07, 918.37 and 579.70 is: 798.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.07 : 918.37 = 579.70 : x
  2. Step 2: Convert to fraction form
    667.07/918.37 = 579.70/x
  3. Step 3: Cross multiply
    667.07x = 918.37 × 579.70
  4. Step 4: Simplify right side
    667.07x = 532,379.09
  5. Step 5: Solve for x
    x = 532,379.09/667.07
  6. Step 6: Final answer
    x = 798.09

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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.