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Finding the Fourth Proportional to 547.74, 821.61 and 223.07

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Solution

The fourth proportional to 547.74, 821.61 and 223.07 is: 334.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.74 : 821.61 = 223.07 : x
  2. Step 2: Convert to fraction form
    547.74/821.61 = 223.07/x
  3. Step 3: Cross multiply
    547.74x = 821.61 × 223.07
  4. Step 4: Simplify right side
    547.74x = 183,272.43
  5. Step 5: Solve for x
    x = 183,272.43/547.74
  6. Step 6: Final answer
    x = 334.60

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Double scale
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Similar ratio
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1.5x scale

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.