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Finding the Fourth Proportional to 489,880.70, 675,988.71 and 274,971.50

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Solution

The fourth proportional to 489,880.70, 675,988.71 and 274,971.50 is: 379,434.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,880.70 : 675,988.71 = 274,971.50 : x
  2. Step 2: Convert to fraction form
    489,880.70/675,988.71 = 274,971.50/x
  3. Step 3: Cross multiply
    489,880.70x = 675,988.71 × 274,971.50
  4. Step 4: Simplify right side
    489,880.70x = 185,877,629,571.77
  5. Step 5: Solve for x
    x = 185,877,629,571.77/489,880.70
  6. Step 6: Final answer
    x = 379,434.48

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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.