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Finding the Fourth Proportional to 684.80, 945.60 and 452.96

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Solution

The fourth proportional to 684.80, 945.60 and 452.96 is: 625.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    684.80 : 945.60 = 452.96 : x
  2. Step 2: Convert to fraction form
    684.80/945.60 = 452.96/x
  3. Step 3: Cross multiply
    684.80x = 945.60 × 452.96
  4. Step 4: Simplify right side
    684.80x = 428,318.98
  5. Step 5: Solve for x
    x = 428,318.98/684.80
  6. Step 6: Final answer
    x = 625.47

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1.5x scale

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.