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Finding the Fourth Proportional to 607,486.80, 911,230.20 and 489,388.80

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Solution

The fourth proportional to 607,486.80, 911,230.20 and 489,388.80 is: 734,083.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    607,486.80 : 911,230.20 = 489,388.80 : x
  2. Step 2: Convert to fraction form
    607,486.80/911,230.20 = 489,388.80/x
  3. Step 3: Cross multiply
    607,486.80x = 911,230.20 × 489,388.80
  4. Step 4: Simplify right side
    607,486.80x = 445,945,854,101.76
  5. Step 5: Solve for x
    x = 445,945,854,101.76/607,486.80
  6. Step 6: Final answer
    x = 734,083.20

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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.