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Finding the Fourth Proportional to 283.92, 426.72 and 188.40

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Solution

The fourth proportional to 283.92, 426.72 and 188.40 is: 283.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.92 : 426.72 = 188.40 : x
  2. Step 2: Convert to fraction form
    283.92/426.72 = 188.40/x
  3. Step 3: Cross multiply
    283.92x = 426.72 × 188.40
  4. Step 4: Simplify right side
    283.92x = 80,394.05
  5. Step 5: Solve for x
    x = 80,394.05/283.92
  6. Step 6: Final answer
    x = 283.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.