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Finding the Fourth Proportional to 621,281.08, 930,703.69 and 321,958

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Solution

The fourth proportional to 621,281.08, 930,703.69 and 321,958 is: 482,305.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,281.08 : 930,703.69 = 321,958 : x
  2. Step 2: Convert to fraction form
    621,281.08/930,703.69 = 321,958/x
  3. Step 3: Cross multiply
    621,281.08x = 930,703.69 × 321,958
  4. Step 4: Simplify right side
    621,281.08x = 299,647,498,625.02
  5. Step 5: Solve for x
    x = 299,647,498,625.02/621,281.08
  6. Step 6: Final answer
    x = 482,305.85

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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.