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Finding the Fourth Proportional to 958.10, 1,438.06 and 633.68

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Solution

The fourth proportional to 958.10, 1,438.06 and 633.68 is: 951.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    958.10 : 1,438.06 = 633.68 : x
  2. Step 2: Convert to fraction form
    958.10/1,438.06 = 633.68/x
  3. Step 3: Cross multiply
    958.10x = 1,438.06 × 633.68
  4. Step 4: Simplify right side
    958.10x = 911,269.86
  5. Step 5: Solve for x
    x = 911,269.86/958.10
  6. Step 6: Final answer
    x = 951.12

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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.