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Finding the Fourth Proportional to 958.76, 1,435.88 and 629.50

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Solution

The fourth proportional to 958.76, 1,435.88 and 629.50 is: 942.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    958.76 : 1,435.88 = 629.50 : x
  2. Step 2: Convert to fraction form
    958.76/1,435.88 = 629.50/x
  3. Step 3: Cross multiply
    958.76x = 1,435.88 × 629.50
  4. Step 4: Simplify right side
    958.76x = 903,876.13
  5. Step 5: Solve for x
    x = 903,876.13/958.76
  6. Step 6: Final answer
    x = 942.76

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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.