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Finding the Fourth Proportional to 890.09, 1,227.72 and 579.59

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Solution

The fourth proportional to 890.09, 1,227.72 and 579.59 is: 799.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    890.09 : 1,227.72 = 579.59 : x
  2. Step 2: Convert to fraction form
    890.09/1,227.72 = 579.59/x
  3. Step 3: Cross multiply
    890.09x = 1,227.72 × 579.59
  4. Step 4: Simplify right side
    890.09x = 711,565.20
  5. Step 5: Solve for x
    x = 711,565.20/890.09
  6. Step 6: Final answer
    x = 799.44

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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.