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Finding the Fourth Proportional to 684.23, 1,025.24 and 440.55

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Solution

The fourth proportional to 684.23, 1,025.24 and 440.55 is: 660.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    684.23 : 1,025.24 = 440.55 : x
  2. Step 2: Convert to fraction form
    684.23/1,025.24 = 440.55/x
  3. Step 3: Cross multiply
    684.23x = 1,025.24 × 440.55
  4. Step 4: Simplify right side
    684.23x = 451,667.28
  5. Step 5: Solve for x
    x = 451,667.28/684.23
  6. Step 6: Final answer
    x = 660.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.