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Finding the Fourth Proportional to 486.60, 669.96 and 453.48

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Solution

The fourth proportional to 486.60, 669.96 and 453.48 is: 624.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.60 : 669.96 = 453.48 : x
  2. Step 2: Convert to fraction form
    486.60/669.96 = 453.48/x
  3. Step 3: Cross multiply
    486.60x = 669.96 × 453.48
  4. Step 4: Simplify right side
    486.60x = 303,813.46
  5. Step 5: Solve for x
    x = 303,813.46/486.60
  6. Step 6: Final answer
    x = 624.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.