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Finding the Fourth Proportional to 423.68, 584.36 and 283.96

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Solution

The fourth proportional to 423.68, 584.36 and 283.96 is: 391.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.68 : 584.36 = 283.96 : x
  2. Step 2: Convert to fraction form
    423.68/584.36 = 283.96/x
  3. Step 3: Cross multiply
    423.68x = 584.36 × 283.96
  4. Step 4: Simplify right side
    423.68x = 165,931.94
  5. Step 5: Solve for x
    x = 165,931.94/423.68
  6. Step 6: Final answer
    x = 391.64

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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.