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Finding the Fourth Proportional to 587.91, 811.53 and 339.33

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Solution

The fourth proportional to 587.91, 811.53 and 339.33 is: 468.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    587.91 : 811.53 = 339.33 : x
  2. Step 2: Convert to fraction form
    587.91/811.53 = 339.33/x
  3. Step 3: Cross multiply
    587.91x = 811.53 × 339.33
  4. Step 4: Simplify right side
    587.91x = 275,376.47
  5. Step 5: Solve for x
    x = 275,376.47/587.91
  6. Step 6: Final answer
    x = 468.40

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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.