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Finding the Fourth Proportional to 656.93, 986.39 and 635.90

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Solution

The fourth proportional to 656.93, 986.39 and 635.90 is: 954.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.93 : 986.39 = 635.90 : x
  2. Step 2: Convert to fraction form
    656.93/986.39 = 635.90/x
  3. Step 3: Cross multiply
    656.93x = 986.39 × 635.90
  4. Step 4: Simplify right side
    656.93x = 627,245.40
  5. Step 5: Solve for x
    x = 627,245.40/656.93
  6. Step 6: Final answer
    x = 954.81

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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.