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Finding the Fourth Proportional to 939.25, 1,296.30 and 590.68

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Solution

The fourth proportional to 939.25, 1,296.30 and 590.68 is: 815.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    939.25 : 1,296.30 = 590.68 : x
  2. Step 2: Convert to fraction form
    939.25/1,296.30 = 590.68/x
  3. Step 3: Cross multiply
    939.25x = 1,296.30 × 590.68
  4. Step 4: Simplify right side
    939.25x = 765,698.48
  5. Step 5: Solve for x
    x = 765,698.48/939.25
  6. Step 6: Final answer
    x = 815.22

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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.