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Finding the Fourth Proportional to 607,908.80, 911,863.20 and 489,810.80

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Solution

The fourth proportional to 607,908.80, 911,863.20 and 489,810.80 is: 734,716.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    607,908.80 : 911,863.20 = 489,810.80 : x
  2. Step 2: Convert to fraction form
    607,908.80/911,863.20 = 489,810.80/x
  3. Step 3: Cross multiply
    607,908.80x = 911,863.20 × 489,810.80
  4. Step 4: Simplify right side
    607,908.80x = 446,640,443,482.56
  5. Step 5: Solve for x
    x = 446,640,443,482.56/607,908.80
  6. Step 6: Final answer
    x = 734,716.20

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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.