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Finding the Fourth Proportional to 641.18, 957.44 and 637.34

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Solution

The fourth proportional to 641.18, 957.44 and 637.34 is: 951.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.18 : 957.44 = 637.34 : x
  2. Step 2: Convert to fraction form
    641.18/957.44 = 637.34/x
  3. Step 3: Cross multiply
    641.18x = 957.44 × 637.34
  4. Step 4: Simplify right side
    641.18x = 610,214.81
  5. Step 5: Solve for x
    x = 610,214.81/641.18
  6. Step 6: Final answer
    x = 951.71

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.