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Finding the Fourth Proportional to 547.37, 821.06 and 316.09

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Solution

The fourth proportional to 547.37, 821.06 and 316.09 is: 474.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.37 : 821.06 = 316.09 : x
  2. Step 2: Convert to fraction form
    547.37/821.06 = 316.09/x
  3. Step 3: Cross multiply
    547.37x = 821.06 × 316.09
  4. Step 4: Simplify right side
    547.37x = 259,523.17
  5. Step 5: Solve for x
    x = 259,523.17/547.37
  6. Step 6: Final answer
    x = 474.13

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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.