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Finding the Fourth Proportional to 489,879.60, 734,128.20 and 240,010.80

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Solution

The fourth proportional to 489,879.60, 734,128.20 and 240,010.80 is: 359,677.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,879.60 : 734,128.20 = 240,010.80 : x
  2. Step 2: Convert to fraction form
    489,879.60/734,128.20 = 240,010.80/x
  3. Step 3: Cross multiply
    489,879.60x = 734,128.20 × 240,010.80
  4. Step 4: Simplify right side
    489,879.60x = 176,198,696,584.56
  5. Step 5: Solve for x
    x = 176,198,696,584.56/489,879.60
  6. Step 6: Final answer
    x = 359,677.55

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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.