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Finding the Fourth Proportional to 453.57, 628.78 and 438.45

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Solution

The fourth proportional to 453.57, 628.78 and 438.45 is: 607.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.57 : 628.78 = 438.45 : x
  2. Step 2: Convert to fraction form
    453.57/628.78 = 438.45/x
  3. Step 3: Cross multiply
    453.57x = 628.78 × 438.45
  4. Step 4: Simplify right side
    453.57x = 275,688.59
  5. Step 5: Solve for x
    x = 275,688.59/453.57
  6. Step 6: Final answer
    x = 607.82

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.