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Finding the Fourth Proportional to 591.19, 815.80 and 339.09

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Solution

The fourth proportional to 591.19, 815.80 and 339.09 is: 467.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    591.19 : 815.80 = 339.09 : x
  2. Step 2: Convert to fraction form
    591.19/815.80 = 339.09/x
  3. Step 3: Cross multiply
    591.19x = 815.80 × 339.09
  4. Step 4: Simplify right side
    591.19x = 276,630.68
  5. Step 5: Solve for x
    x = 276,630.68/591.19
  6. Step 6: Final answer
    x = 467.92

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Double scale
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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.