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Finding the Fourth Proportional to 548.84, 822.21 and 490.42

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Solution

The fourth proportional to 548.84, 822.21 and 490.42 is: 734.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.84 : 822.21 = 490.42 : x
  2. Step 2: Convert to fraction form
    548.84/822.21 = 490.42/x
  3. Step 3: Cross multiply
    548.84x = 822.21 × 490.42
  4. Step 4: Simplify right side
    548.84x = 403,227.42
  5. Step 5: Solve for x
    x = 403,227.42/548.84
  6. Step 6: Final answer
    x = 734.69

Related Problems

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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.