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Finding the Fourth Proportional to 547.11, 820.55 and 384.87

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Solution

The fourth proportional to 547.11, 820.55 and 384.87 is: 577.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.11 : 820.55 = 384.87 : x
  2. Step 2: Convert to fraction form
    547.11/820.55 = 384.87/x
  3. Step 3: Cross multiply
    547.11x = 820.55 × 384.87
  4. Step 4: Simplify right side
    547.11x = 315,803.15
  5. Step 5: Solve for x
    x = 315,803.15/547.11
  6. Step 6: Final answer
    x = 577.22

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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.