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Finding the Fourth Proportional to 543.96, 817.44 and 287.64

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Solution

The fourth proportional to 543.96, 817.44 and 287.64 is: 432.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.96 : 817.44 = 287.64 : x
  2. Step 2: Convert to fraction form
    543.96/817.44 = 287.64/x
  3. Step 3: Cross multiply
    543.96x = 817.44 × 287.64
  4. Step 4: Simplify right side
    543.96x = 235,128.44
  5. Step 5: Solve for x
    x = 235,128.44/543.96
  6. Step 6: Final answer
    x = 432.25

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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.