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Finding the Fourth Proportional to 684.75, 1,027.14 and 376.56

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Solution

The fourth proportional to 684.75, 1,027.14 and 376.56 is: 564.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    684.75 : 1,027.14 = 376.56 : x
  2. Step 2: Convert to fraction form
    684.75/1,027.14 = 376.56/x
  3. Step 3: Cross multiply
    684.75x = 1,027.14 × 376.56
  4. Step 4: Simplify right side
    684.75x = 386,779.84
  5. Step 5: Solve for x
    x = 386,779.84/684.75
  6. Step 6: Final answer
    x = 564.85

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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.