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Finding the Fourth Proportional to 906.86, 1,251.38 and 533.86

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Solution

The fourth proportional to 906.86, 1,251.38 and 533.86 is: 736.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    906.86 : 1,251.38 = 533.86 : x
  2. Step 2: Convert to fraction form
    906.86/1,251.38 = 533.86/x
  3. Step 3: Cross multiply
    906.86x = 1,251.38 × 533.86
  4. Step 4: Simplify right side
    906.86x = 668,059.93
  5. Step 5: Solve for x
    x = 668,059.93/906.86
  6. Step 6: Final answer
    x = 736.67

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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.