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Finding the Fourth Proportional to 653.70, 979.31 and 625.91

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Solution

The fourth proportional to 653.70, 979.31 and 625.91 is: 937.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.70 : 979.31 = 625.91 : x
  2. Step 2: Convert to fraction form
    653.70/979.31 = 625.91/x
  3. Step 3: Cross multiply
    653.70x = 979.31 × 625.91
  4. Step 4: Simplify right side
    653.70x = 612,958.58
  5. Step 5: Solve for x
    x = 612,958.58/653.70
  6. Step 6: Final answer
    x = 937.67

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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.