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Finding the Fourth Proportional to 979.89, 1,469.97 and 590.19

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Solution

The fourth proportional to 979.89, 1,469.97 and 590.19 is: 885.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    979.89 : 1,469.97 = 590.19 : x
  2. Step 2: Convert to fraction form
    979.89/1,469.97 = 590.19/x
  3. Step 3: Cross multiply
    979.89x = 1,469.97 × 590.19
  4. Step 4: Simplify right side
    979.89x = 867,561.59
  5. Step 5: Solve for x
    x = 867,561.59/979.89
  6. Step 6: Final answer
    x = 885.37

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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.