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Finding the Fourth Proportional to 489,765, 675,838.62 and 274,863.57

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Solution

The fourth proportional to 489,765, 675,838.62 and 274,863.57 is: 379,290.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,765 : 675,838.62 = 274,863.57 : x
  2. Step 2: Convert to fraction form
    489,765/675,838.62 = 274,863.57/x
  3. Step 3: Cross multiply
    489,765x = 675,838.62 × 274,863.57
  4. Step 4: Simplify right side
    489,765x = 185,763,415,837.07
  5. Step 5: Solve for x
    x = 185,763,415,837.07/489,765
  6. Step 6: Final answer
    x = 379,290.92

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1.5x scale

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.