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Finding the Fourth Proportional to 489,404.88, 675,227.38 and 285,311.33

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Solution

The fourth proportional to 489,404.88, 675,227.38 and 285,311.33 is: 393,641.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,404.88 : 675,227.38 = 285,311.33 : x
  2. Step 2: Convert to fraction form
    489,404.88/675,227.38 = 285,311.33/x
  3. Step 3: Cross multiply
    489,404.88x = 675,227.38 × 285,311.33
  4. Step 4: Simplify right side
    489,404.88x = 192,650,022,815.01
  5. Step 5: Solve for x
    x = 192,650,022,815.01/489,404.88
  6. Step 6: Final answer
    x = 393,641.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.