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Finding the Fourth Proportional to 685,954.32, 946,540.37 and 379,954.78

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Solution

The fourth proportional to 685,954.32, 946,540.37 and 379,954.78 is: 524,295.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,954.32 : 946,540.37 = 379,954.78 : x
  2. Step 2: Convert to fraction form
    685,954.32/946,540.37 = 379,954.78/x
  3. Step 3: Cross multiply
    685,954.32x = 946,540.37 × 379,954.78
  4. Step 4: Simplify right side
    685,954.32x = 359,642,539,815.05
  5. Step 5: Solve for x
    x = 359,642,539,815.05/685,954.32
  6. Step 6: Final answer
    x = 524,295.17

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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.