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Finding the Fourth Proportional to 370.55, 511.29 and 221.24

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Solution

The fourth proportional to 370.55, 511.29 and 221.24 is: 305.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.55 : 511.29 = 221.24 : x
  2. Step 2: Convert to fraction form
    370.55/511.29 = 221.24/x
  3. Step 3: Cross multiply
    370.55x = 511.29 × 221.24
  4. Step 4: Simplify right side
    370.55x = 113,119.08
  5. Step 5: Solve for x
    x = 113,119.08/370.55
  6. Step 6: Final answer
    x = 305.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.