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Finding the Fourth Proportional to 621,433.46, 930,145.44 and 321,501

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Solution

The fourth proportional to 621,433.46, 930,145.44 and 321,501 is: 481,214.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,433.46 : 930,145.44 = 321,501 : x
  2. Step 2: Convert to fraction form
    621,433.46/930,145.44 = 321,501/x
  3. Step 3: Cross multiply
    621,433.46x = 930,145.44 × 321,501
  4. Step 4: Simplify right side
    621,433.46x = 299,042,689,105.44
  5. Step 5: Solve for x
    x = 299,042,689,105.44/621,433.46
  6. Step 6: Final answer
    x = 481,214.33

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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.