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Finding the Fourth Proportional to 684.86, 1,027.52 and 376.31

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Solution

The fourth proportional to 684.86, 1,027.52 and 376.31 is: 564.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    684.86 : 1,027.52 = 376.31 : x
  2. Step 2: Convert to fraction form
    684.86/1,027.52 = 376.31/x
  3. Step 3: Cross multiply
    684.86x = 1,027.52 × 376.31
  4. Step 4: Simplify right side
    684.86x = 386,659.03
  5. Step 5: Solve for x
    x = 386,659.03/684.86
  6. Step 6: Final answer
    x = 564.59

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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.