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Finding the Fourth Proportional to 686, 944.60 and 587.56

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Solution

The fourth proportional to 686, 944.60 and 587.56 is: 809.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    686 : 944.60 = 587.56 : x
  2. Step 2: Convert to fraction form
    686/944.60 = 587.56/x
  3. Step 3: Cross multiply
    686x = 944.60 × 587.56
  4. Step 4: Simplify right side
    686x = 555,009.18
  5. Step 5: Solve for x
    x = 555,009.18/686
  6. Step 6: Final answer
    x = 809.05

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.