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Finding the Fourth Proportional to 370.44, 511.65 and 321.30

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Solution

The fourth proportional to 370.44, 511.65 and 321.30 is: 443.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.44 : 511.65 = 321.30 : x
  2. Step 2: Convert to fraction form
    370.44/511.65 = 321.30/x
  3. Step 3: Cross multiply
    370.44x = 511.65 × 321.30
  4. Step 4: Simplify right side
    370.44x = 164,393.15
  5. Step 5: Solve for x
    x = 164,393.15/370.44
  6. Step 6: Final answer
    x = 443.78

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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.