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Finding the Fourth Proportional to 445.38, 670.66 and 330.64

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Solution

The fourth proportional to 445.38, 670.66 and 330.64 is: 497.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.38 : 670.66 = 330.64 : x
  2. Step 2: Convert to fraction form
    445.38/670.66 = 330.64/x
  3. Step 3: Cross multiply
    445.38x = 670.66 × 330.64
  4. Step 4: Simplify right side
    445.38x = 221,742.02
  5. Step 5: Solve for x
    x = 221,742.02/445.38
  6. Step 6: Final answer
    x = 497.88

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.