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Finding the Fourth Proportional to 591.80, 816.70 and 329.80

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Solution

The fourth proportional to 591.80, 816.70 and 329.80 is: 455.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    591.80 : 816.70 = 329.80 : x
  2. Step 2: Convert to fraction form
    591.80/816.70 = 329.80/x
  3. Step 3: Cross multiply
    591.80x = 816.70 × 329.80
  4. Step 4: Simplify right side
    591.80x = 269,347.66
  5. Step 5: Solve for x
    x = 269,347.66/591.80
  6. Step 6: Final answer
    x = 455.13

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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.