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Finding the Fourth Proportional to 547.49, 820.83 and 287.17

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Solution

The fourth proportional to 547.49, 820.83 and 287.17 is: 430.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.49 : 820.83 = 287.17 : x
  2. Step 2: Convert to fraction form
    547.49/820.83 = 287.17/x
  3. Step 3: Cross multiply
    547.49x = 820.83 × 287.17
  4. Step 4: Simplify right side
    547.49x = 235,717.75
  5. Step 5: Solve for x
    x = 235,717.75/547.49
  6. Step 6: Final answer
    x = 430.54

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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.