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Finding the Fourth Proportional to 547.90, 821.45 and 223.10

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Solution

The fourth proportional to 547.90, 821.45 and 223.10 is: 334.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.90 : 821.45 = 223.10 : x
  2. Step 2: Convert to fraction form
    547.90/821.45 = 223.10/x
  3. Step 3: Cross multiply
    547.90x = 821.45 × 223.10
  4. Step 4: Simplify right side
    547.90x = 183,265.50
  5. Step 5: Solve for x
    x = 183,265.50/547.90
  6. Step 6: Final answer
    x = 334.49

Related Problems

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Half scale
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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.