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Finding the Fourth Proportional to 587.81, 811.26 and 339.08

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Solution

The fourth proportional to 587.81, 811.26 and 339.08 is: 467.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    587.81 : 811.26 = 339.08 : x
  2. Step 2: Convert to fraction form
    587.81/811.26 = 339.08/x
  3. Step 3: Cross multiply
    587.81x = 811.26 × 339.08
  4. Step 4: Simplify right side
    587.81x = 275,076.29
  5. Step 5: Solve for x
    x = 275,076.29/587.81
  6. Step 6: Final answer
    x = 467.97

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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.