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Finding the Fourth Proportional to 384.50, 577.08 and 221.96

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Solution

The fourth proportional to 384.50, 577.08 and 221.96 is: 333.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    384.50 : 577.08 = 221.96 : x
  2. Step 2: Convert to fraction form
    384.50/577.08 = 221.96/x
  3. Step 3: Cross multiply
    384.50x = 577.08 × 221.96
  4. Step 4: Simplify right side
    384.50x = 128,088.68
  5. Step 5: Solve for x
    x = 128,088.68/384.50
  6. Step 6: Final answer
    x = 333.13

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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.