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Finding the Fourth Proportional to 641.39, 957.38 and 550.67

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Solution

The fourth proportional to 641.39, 957.38 and 550.67 is: 821.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.39 : 957.38 = 550.67 : x
  2. Step 2: Convert to fraction form
    641.39/957.38 = 550.67/x
  3. Step 3: Cross multiply
    641.39x = 957.38 × 550.67
  4. Step 4: Simplify right side
    641.39x = 527,192.90
  5. Step 5: Solve for x
    x = 527,192.90/641.39
  6. Step 6: Final answer
    x = 821.96

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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.