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Finding the Fourth Proportional to 684.83, 1,025.66 and 440.61

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Solution

The fourth proportional to 684.83, 1,025.66 and 440.61 is: 659.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    684.83 : 1,025.66 = 440.61 : x
  2. Step 2: Convert to fraction form
    684.83/1,025.66 = 440.61/x
  3. Step 3: Cross multiply
    684.83x = 1,025.66 × 440.61
  4. Step 4: Simplify right side
    684.83x = 451,913.85
  5. Step 5: Solve for x
    x = 451,913.85/684.83
  6. Step 6: Final answer
    x = 659.90

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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.