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Finding the Fourth Proportional to 489,756.43, 675,812.01 and 274,920.13

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Solution

The fourth proportional to 489,756.43, 675,812.01 and 274,920.13 is: 379,360.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,756.43 : 675,812.01 = 274,920.13 : x
  2. Step 2: Convert to fraction form
    489,756.43/675,812.01 = 274,920.13/x
  3. Step 3: Cross multiply
    489,756.43x = 675,812.01 × 274,920.13
  4. Step 4: Simplify right side
    489,756.43x = 185,794,325,644.76
  5. Step 5: Solve for x
    x = 185,794,325,644.76/489,756.43
  6. Step 6: Final answer
    x = 379,360.67

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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.