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Finding the Fourth Proportional to 548.05, 822.08 and 387.67

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Solution

The fourth proportional to 548.05, 822.08 and 387.67 is: 581.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.05 : 822.08 = 387.67 : x
  2. Step 2: Convert to fraction form
    548.05/822.08 = 387.67/x
  3. Step 3: Cross multiply
    548.05x = 822.08 × 387.67
  4. Step 4: Simplify right side
    548.05x = 318,695.75
  5. Step 5: Solve for x
    x = 318,695.75/548.05
  6. Step 6: Final answer
    x = 581.51

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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.