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Finding the Fourth Proportional to 423.49, 584.62 and 328.75

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Solution

The fourth proportional to 423.49, 584.62 and 328.75 is: 453.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.49 : 584.62 = 328.75 : x
  2. Step 2: Convert to fraction form
    423.49/584.62 = 328.75/x
  3. Step 3: Cross multiply
    423.49x = 584.62 × 328.75
  4. Step 4: Simplify right side
    423.49x = 192,193.83
  5. Step 5: Solve for x
    x = 192,193.83/423.49
  6. Step 6: Final answer
    x = 453.83

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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.