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Finding the Fourth Proportional to 547.25, 821.24 and 258.71

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Solution

The fourth proportional to 547.25, 821.24 and 258.71 is: 388.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.25 : 821.24 = 258.71 : x
  2. Step 2: Convert to fraction form
    547.25/821.24 = 258.71/x
  3. Step 3: Cross multiply
    547.25x = 821.24 × 258.71
  4. Step 4: Simplify right side
    547.25x = 212,461.71
  5. Step 5: Solve for x
    x = 212,461.71/547.25
  6. Step 6: Final answer
    x = 388.24

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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.