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Finding the Fourth Proportional to 685.63, 1,027.99 and 377.25

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Solution

The fourth proportional to 685.63, 1,027.99 and 377.25 is: 565.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    685.63 : 1,027.99 = 377.25 : x
  2. Step 2: Convert to fraction form
    685.63/1,027.99 = 377.25/x
  3. Step 3: Cross multiply
    685.63x = 1,027.99 × 377.25
  4. Step 4: Simplify right side
    685.63x = 387,809.23
  5. Step 5: Solve for x
    x = 387,809.23/685.63
  6. Step 6: Final answer
    x = 565.62

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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.