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Finding the Fourth Proportional to 370.45, 511.20 and 223.15

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Solution

The fourth proportional to 370.45, 511.20 and 223.15 is: 307.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.45 : 511.20 = 223.15 : x
  2. Step 2: Convert to fraction form
    370.45/511.20 = 223.15/x
  3. Step 3: Cross multiply
    370.45x = 511.20 × 223.15
  4. Step 4: Simplify right side
    370.45x = 114,074.28
  5. Step 5: Solve for x
    x = 114,074.28/370.45
  6. Step 6: Final answer
    x = 307.93

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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.