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Finding the Fourth Proportional to 547.84, 821.20 and 259.52

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Solution

The fourth proportional to 547.84, 821.20 and 259.52 is: 389.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.84 : 821.20 = 259.52 : x
  2. Step 2: Convert to fraction form
    547.84/821.20 = 259.52/x
  3. Step 3: Cross multiply
    547.84x = 821.20 × 259.52
  4. Step 4: Simplify right side
    547.84x = 213,117.82
  5. Step 5: Solve for x
    x = 213,117.82/547.84
  6. Step 6: Final answer
    x = 389.01

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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.