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Finding the Fourth Proportional to 620,493.12, 930,889.26 and 215,626.50

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Solution

The fourth proportional to 620,493.12, 930,889.26 and 215,626.50 is: 323,491.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,493.12 : 930,889.26 = 215,626.50 : x
  2. Step 2: Convert to fraction form
    620,493.12/930,889.26 = 215,626.50/x
  3. Step 3: Cross multiply
    620,493.12x = 930,889.26 × 215,626.50
  4. Step 4: Simplify right side
    620,493.12x = 200,724,393,021.39
  5. Step 5: Solve for x
    x = 200,724,393,021.39/620,493.12
  6. Step 6: Final answer
    x = 323,491.73

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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.