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Finding the Fourth Proportional to 547.87, 821.26 and 259.15

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Solution

The fourth proportional to 547.87, 821.26 and 259.15 is: 388.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.87 : 821.26 = 259.15 : x
  2. Step 2: Convert to fraction form
    547.87/821.26 = 259.15/x
  3. Step 3: Cross multiply
    547.87x = 821.26 × 259.15
  4. Step 4: Simplify right side
    547.87x = 212,824.77
  5. Step 5: Solve for x
    x = 212,824.77/547.87
  6. Step 6: Final answer
    x = 388.46

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Double scale
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Similar ratio
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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.