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Finding the Fourth Proportional to 638.96, 957.16 and 382.32

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Solution

The fourth proportional to 638.96, 957.16 and 382.32 is: 572.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.96 : 957.16 = 382.32 : x
  2. Step 2: Convert to fraction form
    638.96/957.16 = 382.32/x
  3. Step 3: Cross multiply
    638.96x = 957.16 × 382.32
  4. Step 4: Simplify right side
    638.96x = 365,941.41
  5. Step 5: Solve for x
    x = 365,941.41/638.96
  6. Step 6: Final answer
    x = 572.71

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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.