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Finding the Fourth Proportional to 489,879.70, 675,987.33 and 274,970.50

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Solution

The fourth proportional to 489,879.70, 675,987.33 and 274,970.50 is: 379,433.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,879.70 : 675,987.33 = 274,970.50 : x
  2. Step 2: Convert to fraction form
    489,879.70/675,987.33 = 274,970.50/x
  3. Step 3: Cross multiply
    489,879.70x = 675,987.33 × 274,970.50
  4. Step 4: Simplify right side
    489,879.70x = 185,876,574,123.77
  5. Step 5: Solve for x
    x = 185,876,574,123.77/489,879.70
  6. Step 6: Final answer
    x = 379,433.10

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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.