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Finding the Fourth Proportional to 423.81, 584.55 and 330.48

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Solution

The fourth proportional to 423.81, 584.55 and 330.48 is: 455.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.81 : 584.55 = 330.48 : x
  2. Step 2: Convert to fraction form
    423.81/584.55 = 330.48/x
  3. Step 3: Cross multiply
    423.81x = 584.55 × 330.48
  4. Step 4: Simplify right side
    423.81x = 193,182.08
  5. Step 5: Solve for x
    x = 193,182.08/423.81
  6. Step 6: Final answer
    x = 455.82

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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.