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Finding the Fourth Proportional to 639.27, 957.35 and 444.47

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Solution

The fourth proportional to 639.27, 957.35 and 444.47 is: 665.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.27 : 957.35 = 444.47 : x
  2. Step 2: Convert to fraction form
    639.27/957.35 = 444.47/x
  3. Step 3: Cross multiply
    639.27x = 957.35 × 444.47
  4. Step 4: Simplify right side
    639.27x = 425,506.35
  5. Step 5: Solve for x
    x = 425,506.35/639.27
  6. Step 6: Final answer
    x = 665.61

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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.