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Finding the Fourth Proportional to 621,029.84, 930,880.35 and 321,208.54

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Solution

The fourth proportional to 621,029.84, 930,880.35 and 321,208.54 is: 481,469.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,029.84 : 930,880.35 = 321,208.54 : x
  2. Step 2: Convert to fraction form
    621,029.84/930,880.35 = 321,208.54/x
  3. Step 3: Cross multiply
    621,029.84x = 930,880.35 × 321,208.54
  4. Step 4: Simplify right side
    621,029.84x = 299,006,715,810.99
  5. Step 5: Solve for x
    x = 299,006,715,810.99/621,029.84
  6. Step 6: Final answer
    x = 481,469.16

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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.